My truck was almost exactly like yours. It's an '88 from southern California. No rust, but the paint was totally shot and had patina/surface rust in a few areas. I debated for a long time on whether or not to keep the patina, paint it myself, or get it painted. In the end, I spent ~$4k to get it professionally done. It's not a $10k "show-quality" paint job, but I'm pretty happy with it. The bed was removed, door jambs, and underside of the hood all painted. If I had to go back and do it again, I would definitely opt for a body shop to do the work.
Before...
After...