Diversification - I think people should be invested in both vehicles. 

Of course, I could pull all of that equity and reinvest it into some other vehicle, but for purposes of some principal protection I would really just be exchanging one for the other, since the 3-6% earned in something fairly bulletproof would be little more than a wash from the marginal tax benefit subtracted from closing & interest costs.

Only one vehicle allowed on property and it must always be licensed and operational. 

For purposes of this provision, “the owner’s legal and permanent residence” shall mean a property owner who makes his or her legal residence at the site, as evidenced by voter registration, vehicle registration, or similar means. 

Check out spartan trailers, which in the late 40’s and early 50s were beautiful, aluminum bodied small houses on wheels that could actually be towed with your vehicle and were typically used as housing.

"Tenant cannot park a vehicle on the front lawn."

Purchase a vehicle if you need one and it makes sense to do so.

Maybe you can sell those and buy some older vehicles you can pay cash for.

I have a good sewer tape, but in this case I needed a strong motorized cutting head, and I don't have a power snake. 

He's an attorney and recognized expert in retirement planning, income tax mitigation and asset protection (among other things).http://www.lexbyers.com/I'd also suggest looking at other tax savings vehicles like others suggested including qualified plans (such as IRA's, 401K's, HSA's, etc) for your employees.