[s_morrison57]

Thanks for the comments, I wondered about the cleaning also, I thought that you would just use it until its time for a new one, hopefully after setting it up numerous times. I never thought of dust from previous use but wetting the floor will help with that.
It's tough to get info on the units, the description's are pretty vague when it comes to the ventilation. I've seen some that have 2 fans, it was a car sized booth but it had 2 fans, 1 for inflation and the other for ventilation. I looked on Amazon too, I was surprised with the price but the description of 1 size might mention reinforced double stitch zippers but the next size up from that makes no mention of that in it's description.
Do you need to run the single fan models full time? Will the booth collapse without the fan? Slow or fast collapse? I guess I'll find out. My son will use it a lot, I just want to paint one of my guitar's.