I have helped make a few different mobile homes into hunting camps, what seems to make or break the builds is a few things, with one being HOW structurally sound is the home to start with
what type of roof is on it, as they were made in many forms and they are not all up to the same quality
MY question to you is, HOW Much time and what skills do you have to do a rebuild?
mobile homes, most of the older one's pre say 1980, were put together with a lot of weak parts, not that they are terrible, but like I said, how much repair and upgrading you have tyo do will be the scale of what its worth to YOU to save or not
on the other side of things, mobile homes can be torn down pretty easy, , most can fit into two large sized dumpsters with easy and most folks that will come and tear it down for you will be glad to take the steel frame to a scrap yard!, as most will use a skidsteer/compact excavator to tear down adn that means they have a trailer to haul the frame, and not much to cutting up a frame to fit on a equipment trailer!
if you want to see how easy a mobile home can be torn down and fitted into dumpsters here is a nice video
NOW some mroe food for thought
if you GUT the whole inside, and as for needing supports besides roof rafters
the answer will sort of come down to again what BUILD is in thing, many different designs on mobile homes ca make the difference on if other supports are needed or Snow lad on roof
This past summer I helped redo roof rafters in a mobile home, due to snow load broke some(50+ yr old mobile home!
the roof rafters were made out of 2x2x12 ft boards and had cardboard shoved in ,. in places to make a rafter have a BOW In things, I am amazed they lasted as long as they did LOL
replaced with custom cut rafters with bows in cut into them out of 2x8x12, HUGE structurally difference in what load the roof can now support as to before!
but again, this all comes down to when the home was built, as they changed rules and designs on how they did roofs, walls and so on!
ask yourself, if you have the time to rebuild it all, do some math, add up costs of materials, add 30% for things you will find as you gut! and be honest with what skills you have and time to commit to the project
its not that hard to figure out the costs, when you put it all down on Paper(well minus the crazy changing costs of materials, right now??)
then ask yourself, when it all done, is it something you really want on your property!
over say, something like a custom pole barn, that you can set up as you like?, where you want it(well mobile homes can be moved pretty easy too)
another bit of food for thought or to consider is, ZONING rights, can you move a mobile home on land, some places won't let you, and will ONLY allow repair of current location on land(thats why we fixed the one we did this summer, zoning wouldn;t let him tear down and replace with something else)
but they can be rebuilt and once done , if done right can be not so bad a place to have
a few hunting amps we redid are down right very very nice!
and LAST , LOL
many times mobile homes can be had FREE< if you go get em!
known a few young guys that used to do that often, get them, rebuild and flip them for hunting cabins and seasonal places in more remote area's, due to being fast easy set ups!