What are you paying per night at an RV park?
That's where the financial models really diverge into an inexplicable situation, IMHO.
Here's a real-world example. In the off-season, we rent about half of our rooms to Winter Texans. We don't make any money on them, really, but we might come close to breaking even.
We rent our double queen rooms for $850/month, no tax added. A full kitchen will run ~$1100/month.
So, that's $27.42/day. Or $35.48/day. We provide twice a week maid service, an off leash dog park, free WiFi and movies, a pool and a hot tub. The senior center is 200 yards away, with lots of old fart activities.
Meanwhile, the RV parks charge $30 - $40/night, for a concrete slab and picnic table. And a nice view of your neighbor's trailer.
Add in the cost of a rig, and the requirement of having a toad (or at least a golf cart), and it quickly becomes apparent that none of this makes financial sense. You could eat surf & turf at the island's finest restaurant EVERY DAY and still be money ahead by staying with us.
Which is, of course, why we are full of Winter Texans every winter.
I'm just struggling to see the allure? I own a 29' Dutchmen motor home, and have lived in it for as long as six weeks. It was nice, but compared to flying my RV-8A to San Antonio and staying in a hotel on the Riverwalk (for example), it was pretty dull, and MORE expensive.