$20 for 20 cans of spray paint.
but seriously, you won't know for sure till you go to a shop to get a free estimate.
the cheapest i found for my fairmont is 4000 even after i strip the old paint off, do all of the body work, and prime it myself. I repainted a 73 Cadillac (6 inches longer than a Suburban) with like 25 cans of spray. it turned out nice, but it wasn't professional...
it all boils down to you get what you pay for... I have been painting for 20 yrs... the best thing that I could recommend is , if you want the paint job to last, to save your money and get it done right the first time.... a cheap job should run from 8-900 and the sky is the limit for a good quality I have painted cars from 1500- 17000. the quality of the products used is a key as well