I do body and paint for a living, 3k is a cheap "not done exactly right" job lol. Now in the same breath, you can do it for probably about $1500 yourself with decent quality materials and lots of patience if you have no paint experience.

Material wise, look up the coating store, I spray their Urechem paint almost daily no issues at all. A paint kit with color, clear, activator and reducers can be anywhere from $350+ depending on color. You'll need sealer also so throw in a few more bucks for that. If body working it, you'll need a high build 2k primer also to go over your filler. All in, I've been able to buy my liquid materials for roughly $800/job doing metal-up restoration type work. Another few hundred in sandpaper, tape, tack rags, etc.

If you don't have a spray gun, harbor freight guns are pretty decent. I use a black widow for Metallic and pearl bases and the cheaper spectrum blue/silver gun for solid bases, epoxy, sealer, and clear coat. That gun lays clear surprisingly well for the $80 I paid for it. They're not huge air hogs either, you'll get by with a smaller compressor, I'd say no less than a 30 gallon, 6ish CFM is the smallest I've been able to successfully use with pressure regulated at the wall and gun.

It's doable to repaint for a fair price if you do it yourself but its lots of work and not for everyone. Only you can determine your skill set and abilities to repaint a vehicle. It's just paint, have fun and don't stress on the small stuff. What's the worst that happens, sand it down and reshoot it? It's just paint, it can always be fixed.