To build or not to build (meaning sell)

I am one of those guys that always have to have 3-4 of the same models of Mopar. Never could stand to have just one, matter of done and perfect or a project. So I relate to anyone with multiple projects. ie. the OP!
This is me. I can not afford to pay someone to do work I can do. So I clean up a project, get ride of the rust and seal my work till I an think about getting it smooth and paint. Then it must run, If it can't what good is it. Then it must drive down the road, otherwise what..... Fortunately it does not have to ever be a show car as I care less about taking it to show for a trophy. As we know, this all adds up to lots of my work an $$$$$$>
Now comes to age deal. I am 72 and the last few years it gets harder all the time t get up off the floor Is her a lift in my future!? Are we going to win the lottery!?? NO So IF the OP is 60, IF he has good health his time is maybe limited to be able to work hard on 5-6 cars.
Try to thin the herd maybe? Or some people just love having a lot of projects sitting around too.