I had a storage unit for a bit and I can tell you that YOU DO NOT WANT ONE!
Also, Spiderman is not as epic as it once was back when it was the latest and greatest game.
LOTR plays way too long. TSPP plays long. STLE is ok but not an epic game compared to other Stern's IMHO.
3 machines I would NEVER even consider buying are MMLE, MBLE, and ACNC.
So there, I solved your problem. 6 less machines to wonder about. As soon as that LOTR is reassembled, dump it.
I just don't understand people. You can always buy ANY machine on your list back from some nice soul sometime in the future or play ANY of them in just about any major city or any major show these days.
You WOULD have some problems with machines that are much harder to replace. I wouldn't worry at all about selling games like those that you've posted. I sold my Tron and was like, "Oh well there it goes. Maybe some day I will buy another."
Most machines in your collection are not there because they are well designed pinball games. I could point out flaws with all of them and why I don't like them but there's just no fun in that any more.
Ten years ago there was no where to play this stuff. Today, the opportunities to play just about any game you want at any time are essentially endless. It's beginning to change the veteran collectors and players and in time, you will see the way as well.