Your RV air conditioner is a much larger and stronger unit, but even its cooling capacity is limited. Adding a second air conditioner is one of them. Getting another AC unit is not as easy and buying it, hooking it up, and turning it on. There are a lot of considerations that must be made before you start shopping.
How do you put an air conditioner in an RV?
https://www.youtube.com/watch?v=Rnsq8H2bYmM
How much does it cost to put central air in a trailer?
The cost of installing central air in a mobile home is between $3,000 and $7,000. If your mobile home does not have ducts already installed, this project may not be possible. Many mobile homes do not have the space to retrofit ducts. If you want air conditioning, consider ductless, mini-split, or window units.