I have two separate observations.
First and foremost, I agree that accessories are expensive, but I find that in general, Festool's accessories add a lot more to their respective tools than accessories from other manufacturers. I figured out, for example, that the guide rail stop blocks for the routers work much better than one of hte normal clamp on rail guides, because there's an ability to micro-adjust... which is a lot easier than moving the guide rail and then squaring it up again, if it's not right. But not only that, they double as a really nice offset base when running edging and slot cutting bits, and they turn what is normally a top heavy machine into a really easy thing to move around the edge of a panel. And the combination of the 1010 with the edge trimming setup is well worth the price of admission. If you're going to be facing your plywood edging, this is an irreplaceable tool, and it's just indispensable. The ability to use the routers and the jigsaw with the guide rail adds a lot to the system in general. Yes, the accessories are expensive. But the versatility they add to their respective tools more than justfies the cost... totally unlike something like a $20 ripping fence for a DeWalt circ saw. The accessories from Festool are worth the price.
Second... on running a garage shop.
I had a basement shop for a while, and one of the first things I noticed about adding in a full size contractor's saw (Delta saw w/ biesemeyer fence) was that the contractor's saw immediately took up a lot of real estate in the shop. The shop got clogged for a while, and then I got sucked into a side project for the remaining time until I opened up a one man shop in a local industrial building. Then I started seriously looking through this site.
This thread really got my head spinning for a while. At that point, I already had a SawStop cabinet saw, a Laguna 18" band saw, and a host of other stuff, big 5hp cyclone, etc. I'd been building up a tool collection for a while, and just let the basement get filled in with tools. I ran that shop for a year before I moved to a bigger location, and set up with a couple of friends of mine.
Looking back, if I had to do it again, I would have bought the Laguna 18, and left it at that, and filled the rest of the shop with hand tools and festool. The band saw still has in and out feed requirements, but it takes up a lot less floor space... and once I learned to properly tune mine up, I use it for a lot of work that I used to use the table saw for... but it feels a little safer and more controllable for things like breaking down rough lumber. For sheet goods, I'd rather wrestle with the TS 55 than a full sized sheet. I know my cabinet saw is awesomely accurate. But it's still a drag to break down plywood with it. For plywood, I use my track saw. For solid lumber, I generally use the band saw when I can. I actually end up using the table saw a lot to cut joinery. Go figure.
The table saw is pretty ubiquitous. And I think that it's a great compromise for one tool to be able to perform many different tasks. The band saw, by comparison, is also seen pretty frequently, but most of the ones I've seen aren't used or tuned as optimally as they should be. They're more useful than most people give them credit for. So my work methods have been changing, and if and when I move again, it's very likely that I'll be rethinking a lot about how I work.
The station approach.
