I have made two sets of half doors for 1st gen 4 Runners so far, one set for myself and one set fro a buddy. The set I built myself were the first ones I made and took me probably 14-16 hours to do both of them and that didn't include any Bondo work, interior panl, or a nice paint job, just rattle can. I did put cup holders in them by using 3" exhaust tubing.
The set I built for my buddy, I had an extra set of doors that I used. Cut the same way I did my first set and didn't do Bondo, interior panels, cup holders, or any paint. I charged him $150 to build them and that included the cost of the doors. I was into them about 8-10 hours for the pair.
These style doors are pretty easy to build and can all be done with a cutoff wheel and welder. I used 14 gauge steel to make the caps and made them in three pieces. On the flat in the middle is where I put the door release, just patched up the old exterior handle. The release rod to open the doors is easy to cut and re-weld as well.
Here is a picture that shows the doors, I can take others if you are interested.