I think the reason you might have more problems with 5th wheels is that people drive them around and things like electrical and plumbing loosen up. When mine was set up, I had to call and get a small leak on the water line to the ice maker fixed. I don't plan to ever move it around. I don't think you could do that with a park model either.
Anyway, after two years, my wife and I really like being at Fork in a secure area with our own place to stay and fix up the way we want.
You can't go wrong either way. Park model or 5th wheel.

If you can get a park model that�s what I would do. At sometime the others will start leaking water. The toilets and showers are considerably better. That�s just my opinion based on what I have seen.

We have a Breckenridge park model and love it.

No bash to the RV owners cus I'm one but: Park Model if you are never wanting to to drag it around camping. Like the difference between a Tiny House and a camper. While movable when necessary they will not depreciate(and dilapidate) like a camper.

Plus don�t have to worry about slide outs leaking, electric boards going out on water heater,and fridge going out. All in all,park model less problems. And roofs won�t have to be redone,and sides won�t delaminate.

I will throw my advice in as well and vote for Park Model. We have had a bumper pull and 5th wheel and both have required yearly repair expenses. We did buy used both time to avoid the initial depreciation.

Now that we have the waterfront spot if I was positive we were going to keep our place at the lake I would buy a Park model with the loft space and actual stairs up to the loft. From my experience campers work well but are just not built for the every weekend type use as they age. As others mentioned the water heater, inverter/converter, roof damage due to tree limbs after a storm, etc.are all problems you will encounter.

I like with a park model you have better insulation, better windows, real siding, real roofs, home quality electrical system, and a much more efficient hvac. Sure you loose a little space from no slides and the configuration but the true lock and leave function is worth it I believe now. The initial cost will be a little more but in the long run I think it will save you money overall and resale will be much better if you ever decide to move on.