A good HVLP unit, with a high cfm (CUBIC FEET PER MINUTE) rating, will run about $1000 , new, or you can rent one. of course, you need to use a true two-stage epoxy (short pot life, highly toxic) paint, a dust free enviornment (on a construction site, not likely) and a lot of experience.

you're better off farming it out. (but you figured that out already.)

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"The law, in its majestic equality, forbids the rich as well as the poor to sleep under bridges, to beg in the streets, and to steal bread."