even park models use propane, unless its an 'all electric' model
holding tanks are not that big a deal, if hooked up to city septic, just open the valves and dump once a week
but i guess if you find the right plumber, the plumbing could be modified
i don;t know the availability of park models in your area
but they are NOT called campers, if you search campers on the web, you are not going to find 'park models'
search for 'mobile home' or park model trailer, etc..
I can explain it to you.
But I Can Not understand it for you !
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1997 F53 Bounder 36s