well thanks to everyone for there input and I have ordered a fresh air system and upgraded to a 50' foot hose.... I figure my makeshift booth is going to be 20 feet long so that would put the pump right outside the enclosure...(with a 25' hose) now it can be atleast 15 feet away or so... I figure I will put it on the fresh air side where my vents will be... then the exhaust fan pushing 2475 cfm's will be on the back side with a 10 foot hose on it exhausting 10 feet from the enclosure so my pump should be about 45 feet from where the fumes will be exhausted... that should be safe shouldn't it??

thanks again
simon