Congrats - nice problem to have !!! gee-or-gee-us unit !
but looks like WAY too much work and prone to damage each time you want to 'enjoy' your nice rig
just getting ready for a trip is work enough !!!
I'd check with your municipality (and HOA if u have one) about altering the slope to make a more permanent solution...
or how about paying the less than $100 per month to store it elsewhere
Our covered parking for the 5th wheel is $55 per month here in the country !
we just go get it the day or so before, park in the street and use the lawn tractor / golf cart/ small trailer/wagons as a tow vehicle/hauler to haul the stuff from the house to the street and go enjoy...