We ordered an Onan installed in our 5th wheel and it was great. When it was about 10 years old it broke. We were on a trip with lots of boondocking so we went to the nearest Honda Power Equipment dealer and bought 2 Honda 2000i generators with the parallel Kit. Total about $1800 versus $4000 to replace the Onan.
Although it was convenient to have the remote start with the Onan, having to manually start the Hondas hasn't been a real problem. Now There are portables with remote start using a key fob.
Here's what I like about the portables:
I can carry just one if we won't need air conditioning. Or carry the two if we will need air conditioning or other high draw electrical appliance.
I can use them away from the 5th wheel. I've used them at home when th power went out and was going to be out for 36 hours.
I've used them on a job site to power an electric jackhammer
I used them while tent camping at offroad races to run a TV and DVD player to entertain the pit crew with a movie while we sat around the campfire.
To run power tools while helping a friend to build a remote cabin
At the storage lot where we keep our 5th wheel to provide power for cleaning, repairs and maintenance.
The flexibility of the portables make them my choice. If buying today I would get one of the remote start portables. Here's a youtube of one in action
https://www.youtube.com/watch?v=28JGt18fBVQ
Biggest problem is theft. You need to make sure the portables are locked up during the day with more than just a bicycle lock/chain/cable. You need something heavy duty. I use a 1 inch in diameter cable lock made for large motorcycles and a logging chain with a high strength pad lock. At night I lock the generators up in the cab of my truck. They both fit in the floor area of the front seat.
