if you are able to strip the car right down then thats quite a bit done.
leave a paint shop to prep and paint it (every spot preps differently and most won't allow you to do it yourself).
and then you return when its baked and cured you refit all the bits
but prices range hugely, you could get it done for as little as £80, my paddling mate got his LWB vw van done for £80 and the paint job was passable for a van (hadn't been flattened between coats, but meh, he ran the drivers side down a 4ft high wall within a month of having it, now its rusty, so its not important as a working vehicle).