I think you'll be OK.I would make sure that you have some kind of vent or let the door open during the day while you working on your project.

It's not that as much as it is the cabinet companies are very proud of their stuff. Even with particle board boxes!

I guess to some degree it depends on the materials and design. 
I built my first kitchen (30 years back) primarily with decent hand tools and basic Bosch tools, in the dining room, mind you just married and no kids...
There are still family jokes about doing the washing up in the bath for 6 months.

I made the first in what I can best describe as a space frame structure.  But essentially got the structure up and then made and hung the doors and shelves. 
If you don't factor in your time, there is no doubt in my mind you can match costs and control quality.

my second was based around a modular system - I bought the first couple of shells, and then just replicated them.
My third I paid a local professional company to make, over £25k and despite the requested - no chipboard just solid wood, still got considerable quantities of veneered chipboard and MDF - some of which wasn't even oak veneer...

I am sure building and installing a modular system, before embarking on the doors is the way to go.  Personally the best thing about the 3rd kitchen was the granite worktops which still looked good 10 years later. 

I too am planning to build my next kitchen, when the extension is complete, in a similar sized garage.  I think finding a second dry storage location is the only thing needed...

Heres my 2 cents.
I have built a couple kitchens. The first took a very long time. We did not properly plan and spent a pot of time figuring out cut list. I have since started using sketchup. It makes a world of differance. On the second one i also decided  to buy the doors. It save a lot of time. Check out northern contours.
I always prefer a separate toe kick and do a lot of framesless cabinets. Not my favorite look but faster easier and cheaper.
There are a few companies that sell the framless boxes. That would solve your storage issue. I think one of them is quick-cabs.
Good luck.

Lol!  My garage is basically overflowing with tools and machines. I have to park some of them outside when I set up shop. Cars do live outside much to the chagrin of my wife 

This is all about planning. Do as much as you can at your desk: list the panels, hardwood parts, and hardware you need. Specify the "machining"--holes, dados, notches, etc. required for each part. I use a spreadsheet for this, organized by "boxes." When you review and "QA" your list, you might be surprised at the number of parts, the amont of machining, the quantity of hardware, and the overall logistical challenge of pulling everything together smoothly and efficiently. Consider pre-building doors and drawers, but assembling the cabs on site. After the existing kitchen is demo-ed, you'll have some room to work, and if everthing is ready to go together (pre-finish the interiors!), this is pretty quick.

Have you begun this project yet?  I am about to start a similar project for myself and family.  From the research I've done, I'm planning on buying the boxes from Cabinets Quick and then making my own doors...

I hope it's going well for you!

That would be the efficient thing to do - but I'm on a roll of being inefficient!  Actually, I've built a few kitchens and I really like building the doors because that's the part that I get to see everyday.  But it definitely isn't the quickest route...

Hey Guys, just wanted to give you all a quick update:  I have started on this project and am well underway now.  I have been constructing the cabinet boxes and face frames to start with, doors and drawers come later.  I started a blog about my kitchen remodel that you can visit by clicking on my name then clicking "My Kitchen Remodel Blog" which will take you to the site.  Or just click the little earth under my name to get there!  Thanks for looking and leave me some comments! 

Jeff:
Looks good.
It would be nice to see your plans, drawings so we can follow along with your progress.
Tim

@ Peter:  Thanks for the kind words.  I'm used to the heat but it doesn't get any easier, thank God for fans!

@ Tim:  I've got some very rough sketches of the elevation of each wall, I'll try to post those on the blog.  I'm going to take some pictures of the kitchen so you all can see how outdated and in need of help our kitchen is!  I'm duplicating about 50% of what's already there.  I am taking down one wall and extending cabinets along another wall so we should in the end wind up with more cabinet space and a little more countertop space.

I've thought about installing them as I go along, but with taking down a wall and raising the current ceiling height, I'm going to try to save all the demo for one phase that will hopefully take just a couple weeks to demo and redo.

Karl,

This is my first kitchen and it does indeed help to see other people's work.  I checked out your google plus and like the work you do, very nice!  I'm getting ready to build the uppers and I thought of one question.  I was thinking about building the face frames with a 2 1/4" lower rail to be a built in light rail.  Would you do this, or build it with say a 1 1/2" lower face frame rail and then add a light rail molding later?  Thanks for posting!

Good point Karl.  My client is my wife in this case, so I better get it right!  I think I'll use the wider bottom rail on the cabinets and that way I'll be covered for lighting.  I'm using LED lights and they have a pretty low profile so I won't need that deep a recess for them.  Thanks for your thoughts!

Jeff,

I just read the whole thread. Big thumbs up on building them yourself. Seems you have worked through the need for storage. If you use the Domino and 32mm system you can dry fit them, know they work and then break them down till you need to assemble them.

Keep up the good work. 

I too will do the same as you, as I know I can build them cheaper then buying them as the Kitchen has some odd sized things to deal with..

Keep us informed and post images when you can.

Cheers,
Steve

Can you send a link to your website Blog.... or did I miss that... just looked twice but the phone is ringing..

Cheers,
Steve