Always look at this type of thing in a worse case scenario. You can only get better from the lowest point.
You already claimed Jeep parts are hard to come by. How? With the shipping of today, mail order parts should readily be available. Cost may be prohibited but that's another thing to it all and you probably forgot to mention it.
It is always about money. Cost wise, if you purchase it for whatever price that you would be happy with, why not take what you need then part the rest out? Or do you what another project sucking the pockets empty? You may be able to sell what is left for more than you spend on it in the first place.
Selling and parting vehicles is very tedious and time consuming. Weather plays a big factor as well. Once the weather turns for the better for a week or 2, people will want to do something outdoors.
I currently have 5 vehicles (3 97 TJs) with 2 drivers in the house. 1 TJ is not-running and I probably shouldn't have bought it. Currently, I'm paying a loan on it, as well as insurance. I do have a set of 1ton axles, dual tcase setup, and a 4.3l/auto collectively waiting for assembly. I will need another estimated $3k to assemble (small parts add up quickly) and have a running TJ with everything installed and that is without tires/wheels.