Well, quick update:
I ordered all the parts to rebuild the lift system. Everything came in a couple of weeks ago, but one of the parts was wrong. Just got that delivered to the house on Monday. Yesterday, I had to come off the road because my wife is really sick. I didn't like what I found sitting in the back yard when I pulled in the driveway:
The camper roof was braced up with 2x4's inside while I was doing the work on it. Well, we've had some pretty good wind at home and the roof decided that it didn't want to stay on the 2x's any more. Luckily, for me, I was able to get inside and finish the repairs to the lift system. After that was done, it was actually really easy to put the roof back on, even by myself. At the back of the camper, there was a cabinet sitting on a bench seat, so that kept that end up. At the front, there was 1 2x4 left in place. So, I was able to basically just push it sideways and get it back into the support posts.
I still have to make adjustments to the roof, but that's pretty simple. And, yes, it's completely closed up now. Glad I did too - there was a pretty good storm here this morning.
While I was waiting on the parts, I checked everything else out on it. Everything works (stove, oven, furnace, water pump & water heater and the fridge). I'm going to have to replace the power converter because it's ultra-noisy and it's not charging the battery. The replacement for that isn't too bad price-wise (about $150), plus they're a lot better now. They have an automatic 'storage mode', which is basically a trickle charger for the battery. If you go in and start turning stuff on, it kicks back to the regular operation.
Hoping to be able to actually take it camping in the next couple of weeks!