Usually 3 inches in interior walls.
If you own the mobile home, then you have the right to remove it from the mobile home park, unless you are in a lease agreement between you and the mobile home park.
Just the same way as in regular house. Remove one side of the wall and slide insulation batts inside, the recover wall.
Usually because of a cracked heat exchanger
The interior walls of a home can be roughcast using a product called Spackle. The Spackle is applied to the walls and then a special roller is used to move the Spackle around. Then the Spackle is allowed to dry. The walls can then be painted but only with an air gun to get into all the time spaces.
If you are in a mobile home during a tornado, seek shelter immediately in a nearby sturdy building or storm shelter. If that's not an option, go to the lowest level of the home, such as a basement or interior room, and cover yourself with a mattress or heavy blankets to protect against flying debris. Avoid windows and exterior walls. It is best to evacuate to a safer location if time permits.
Walls are walls, wherever they are. - This problem depends on what the stain is and you haven't said. Possibly easiest to simply repaint the wall - first with a 'stain blocker' such as Zinnser Bull's Eye or Kilz Stain Blocker Primer. -These products work well and ANY paint can be applied over them. -(if the wall is papered, then you should remove paper first.)
Contact the land owner. They would probably be glad to have an offer to remove the mobile home.
Can I get help with a metal roof, insulation in walls, siding, & or underpinning on my double wide mobile?
I think it has something to do with maintaing the temperature in the home. Ventilation. Also, it prevents humidity from destroying the interior of walls.
remove the moisture from inside the walls and floor.
To effectively soundproof interior walls in your home, you can use materials like acoustic foam panels, soundproof curtains, and weatherstripping. Additionally, adding mass to the walls with materials like drywall or mass-loaded vinyl can help reduce noise transmission. Sealing any gaps or cracks in the walls and installing soundproofing insulation can also improve soundproofing.