, well that does seem to be a pretty good price, however it does look like you will be doing some neglected maintenance and repairs.
Provided you don't find more rot and 'you' are capable of doing the repairs you may well be ahead of the game.
, deebarjay, pretty much told you why you were getting hot water via the 110V shore power, but you must have propane when not plugged in.
Just like the hot water tank, you will need propane to get heat from the furnace. The fan runs on 12V (only) and Propane (only).
under sink, No this was not for the safe...you must be able to see the storage area through this hole, yes?, well that is so you can place a laundry basket there and toss you dirties through the hole.
The pictures show a lot of neglect.... that is unfortunate, provided you do not find more rot you may get away with replacing a section of the roof and new rubber for that section and use eternabond tape on the seams.......The picture in not too clear but I would look very close for other leaks and rot starting at the roof then windows and seams.
When a trailer is left with no maintenance for that length of time.... you are sure to get some surprises. They are just not made to 'buy and let sit' with out being under cover or regular maintenance .
Oh.... and don't think you can just go and buy some silicone from Home Depot to do the job....you have to use the "right stuff for the right job" sold by the RV dealers.
, I would say you will have a good deal of caulking to do....for the roof use a dull plastic scrapper to remove old caulking, not all has to come off...just down to solid adhering stuff ...on other areas use a razor blade scraper (carefully)... when all or most is gone wipe down with a rag soaked in white gas...do a section at time... then caulk using the right stuff on vertical surfaces and lap sealant on the roof joints. Caution
...try not to get any of the white gas or any other volatile liquid on the rubber roofing.
You can be sure you will get other opinions on how to and what to use here.
Disclaimer: My comments are only my personal opinions gained from my experience....and from what I have learned from great members like on this forum
In short I hope you find minimal problems and you are able to get out there and enjoy RV life real soon.
Hope this helps
'07 WildCat 30 RLBS ~ West Coast Edition ~
Trail Air - Tri Glide Pin Box
2000 F350 DRW 7.3 Diesel Lariat 89k miles
Edge programmer, 4" SS exhaust turbo/back
Vancouver Island, B.C., Canada