Just for more things to think about. If you buy the $720 MFT you get lots of handy things with it. Like the 1080mm track and the hardware to make a cutting station - flip stops, rail, etc.
I just recently switched to 2 MFT tables in my shop instead of a 4'x7' cart with Parf guide hole grid. With wheels, 18mm ply cost and the parf guide I think I spent $600 to build my cart...
Without the extra $115 worth of accessories for the MFT it's just a table. That kit and some of the other accessories are what make the MFT design really stand out. The reason I switched from my home made setup to MFT was flexibility and ease of setup.
I can now have the same amount of workspace for cutting down sheetgoods OR I can have a cutting station with a separate station for doing assembly or using my CMS. And if I need space for something else I can fold it all up and store it.
If you get the MFT legs really set on your floor it's pretty stable. I wouldn't hand plane on it but that's why I have power tools anyway.

It does take a bit of adjustment, especially if your floor isn't level.
You can always try it out and take it back if you don't like it. But it's kinda like drugs in that way... hahah
As for storage underneath the MFT - you can still build little carts. Or just stack systainers. I have lots of storage around my shop so I haven't bothered with something specific for under the tables. I just have my TS75 underneath and a CT.