Bill, I'm so sorry that your physical situation has diminished faster than you'd expected, and I don't want to be negative at all, but while you say
...I now have the majority of the major parts except the following...
your list of parts you still need are all pretty high dollar pieces, and they comprise most of the rolling chassis. It sounds like you have mainly the engine, tranny, differential, front axle minus spindles, and body? The real problem is that any incomplete project gets dimes on dollars if it comes time to sell before it's done, and you'll hope to get 50% of what you paid for parts, and little or nothing for labor costs invested. I'd say you need to make an honest assessment on your ability to see the project through to the end, and if not then do you continue to invest more in parts, knowing that you'll sell them for a loss? That said, there is a lot of value in the positive aspect of having the project to keep your focus on something positive.

I sense the turmoil you're in about your project, and wish you the best as you decide how to proceed. I don't think anyone can make this decision for you.