Cob in interior of mobile home

Hi there,  new here and I'm loving it!
I just recently acquired a small mobile home,  while my dream was to build a full pallet cobbin- my health has really taken a tole and I won't be able to build much.  My friend gave me a 2 bed 2 bath mobile that needs a lot of work so I'll be taking off walls and floors and redo certain parts of the home.  My question is,  having a 2x4 frame all the way around,  once I replace insulation (do I need to insulate?) and floors where needed possibly some wiring,  can I complete the interior of the mobile home fully? I may leave some of the Paneling as I do like that look also but a lot will be going.  I'm also considering doing the outside if possible over the metal siding.  Has anyone done this? Is this at all possible for interior and exterior? Any help is greatly appreciated.  While I may not be able to do it all myself,  my grown adult children will be helping. Thank you in advance

Hi and welcome to Permies.
I think the rules around here are that you need to have your real or at least a real sounding name.
Now to your mobile home.
I would not omit insulation, as it will keep the temperature lower in summer and higher in winter, massively saving on whatever heating you use. If you’re ripping up all walls from the inside I would even consider putting more insulation than the 2 or 4 inch that the beams provide.
Will you have to move the mobile home ever again? Than cob could be a problem due to weight and maybe not being flexible enough when the home is moved. If not I don see why you couldn’t top the insulation with a cob layer/plaster. You probably have to put down chicken wire to support the cob attaching to the wall.

On the outside I don’t know how you would get it to stick without putting nails through the metal and hanging mesh. Unless you were to build it from the bottom up, thick enough to support its own weight. Also immobilizing the mobile home.
Furthermore, it doesn’t seem like your roof hangs over a lot. So the outside cob would get wet when it rains…
Why is it that you would like to have cob on the outside?
I would prioritize the interior, the exterior seems fine and functional to me.