2013 16RBT “window A/C unit” help

Hi all,

Has anyone replaced the “window air conditioner” style A/C themselves? Is it challenging? I assume you have to replace it from the outside of the camper given the lack of access in the cabinet that it’s mounted in?

I’m thinking about replacing it with a combination AC/Heat Pump unit. The installed furnace uses a ton of propane. We are not cold weather campers, and always have electricity, so I figured this would give us just enough heat for the cool nights.

Anyone tried this?

Thanks!