When I removed my Generac generator I changed the space to storage and then did this. For me this works great.
Here are some pictures of my generator setup with my Honda eu3000.
I bought a cargo rack from I think TSC which was plenty heavy duty, I think rated for 500 pounds. Then I bought a front receiver hitch from curt for $115.00 delivered to my front door. You will notice in the picture I had a welder weld metal plates into the base of the generator. Slid underneath, nothing is welded to the generator but the cargo rack and generator are one. Then I lock the cargo rack in with the highest quality locking pin I could find. I use this rig on the back of my 5th wheel setup and on the front of my truck camper setup. When not in the receiver hitch everything is accessible for working on the generator. I have been using this, this way for 9 years and many many thousands of miles with no problems. A couple other points I like is the extra storage in the outside compartment of my TC. Setup this way it takes about 100 pounds off the rear tires. I also put a blue tote on either side of the generator on long trips to haul drinking water and other gear. Also the honda runs smooth and quietly, I can barely hear or feel the vibration when running. I keep 2 Co detectors in my TC and with this location I feel comfortable sleeping with the generator running.
NOW 2017 Leprechaun 260ds
2005 Forrest River Cardinal 29rkle FW
1998 Lance 980 11'3" TC
2017 CHEVY 3500 SRW 6.0
B@W turnover ball @ companion Hitch
Honda eu3000 generator mounted on cargo rack
Crestliner 1850 Fish Ski boat mostly fishing now!