I've had a paint booth for about 3 years now and love it - before I went out on the patio when the weather was warm and just painted at my desk when the weather was cold - wife hated the latter - really stunk up the place - now with my room in the basement there is no stink (even in the hobby room) - still wear my resperator when I'm painting though - Just be sure you vent it outside - I took out a pane of glass in the window and replaced it with a piece of 1 x 12 cut to size - installed an outside mounting clothes dryer vent in the wood and hooked every thing up - keep the vent run as short as you can - mine's about a foot and half long - try it, I think you'll like it.
Have fun