soooo.
I'm having similar thoughts re dust management.
In short, there's two approaches. A shop van, and a dust extraction system. Broadly speaking shop vac is high pressure, low flow, and the dust extraction is low pressure, high flow. If you are running something like a planer or thicknesser, you'll want a dust extraction system that has 100mm type hoses and really needs installing in the building.
If you just want to do the sander, the circular saw, palm router etc... then a shop vac is fine. I think the festool you're looking at is a shop vac style?
You can improve the life of the filters and such on a shop vac by installing a cyclone separator system, you can buy things that attach to a 25l bucket easily enough, or there's loads to print on thingiverse.
J