Thinking about moving over to a 5th wheel

We have had hitches welded on to each of the two FWs that we have owned. The first one was a Jayco Eagle 215SD and we towed boats weighing up to 5,000 pounds behind that FW with no problems. Second FW, 2012 Jayco HT 26.5 RLS, we had a hitch professionally installed after we bought it and currently tow a 3,500 boat behind it with no problems. The installer reinforced the I beams about 5' forward from the rear of the trailer and totally fabricated the hitch rather than just getting one to weld onto the FW. I would certainly recommend that you get a hitch welded to the frame rather than one attached to the bumper as bumpers are not, generally, well enough attached to carry the load a boat trailer will put on it. By the way, my FW is an HT, so it's a lightweight trailer, more or less, and for mine in 2012, the manufacturer said that adding a hitch to the frame would void the warranty, however, I didn't have a warranty claim so don't know what they would have done. Jayco does now sell the HT FWs with a hitch installed but I believe the hitch weight is limited to 300 pounds.