I don't see anything about epoxy primer or etch primer in your material list it is the hart and sole of a good long lasting paint job it is about 250.00 for a setup 800.00 sounds very cheep there is still masking paper,tape,tack cloths,clean up thinner,pre cleaner,scotch bright,sand paper,filler,base coat reducer,base coat hardner,sealer,sealer hardner,sealer reducer, the list goes on and on.Unless he is donating those things to get the job and he still has a good size electric bill from the fans and compressor to pay, don't sound like much prophet left in the end.make sure of what you are getting for that price if he is planning on putting fill primer over bare metal to save money you will be repainting it the first time it gets any water sprayed on it like rain or washing.If it gets a chip in it rust will run under the paint like a scared rabbit.Not trying to pee in your cheerios but 700-800 just will not get it for ALL of the proper materials for a lasting paint job.
Good luck,Bruce