I'd find a way to test/prove it out before jumping into changing cars and taking on a storage unit.
Do it two times, the full cycle (buy, refurb, store, sell), even if you have to rent a UHaul van or something to get it done and have to trip over the crap in your house until it sells.
Look at the actual outcome and time/effort, not just the asking prices, to see if it makes sense to commit to renting a storage unit and changing vehicles.