[Merc6]

A shop lift is all I can think of, I miss being on or near a military base for this reason. Youngstown/Mansfield reserve station sucks for this reason I think there was a lift where you used power tools to lift but I think it ran a few $G's to buy it before shipping. When I did rubber undercoating on my Subaru I used the ramps and that was a PITA so I know your frustration.

 

[Merc6]

Dig yourself a long deep trench atLeast 4 feet deep . And then walk right under to clean to your hearts content .. I seen a few home garages with this concept implemented during the original construction of those homes . Good luck ..

Not a bad thought so long as you have a sump pump.