(Ask the title company what grant deed or easement instrument is used there)Easement GrantedExplain the rights of use, unrestricted or get smarter and limit vehicle weight so your neighbor doesn't park a loaded semi on the driveway.

@Joel Owensthe service I provide (self-directed Solo 401k plans) is a niche service and most of those investors who contact me are not there yet and the reason they come to me because they can benefit from this vehicle. 

How many vehicles?

@Wayne Brooks  this is one of the most vial investment vehicles I have seen in all my years.. but I know life insurance companies do it every day.. and maybe some folks who are terminal and have a good policy want to get cash now so they can see the world.

It was an intoxication assault with vehicle charge 4 years ago.

So long as you use any tax vehicle - IRA LLC, Business Corporation, Trust, etc. - appropriately, and engage proper counsel to help you do so, then you should be able to proceed with confidence.

Ask your tenant directly, or get photographs of the vehicle with time stamps.  

Lots of Brazilians buy a new car and pay the outrageous interest rate until the car is paid off and trade it in for the latest model, considering the monthly cost like an expensive Lease vehicle.

If you decide to work with a partner I suggest the following:1)  Get involved in the DD and review the supporting docs to truly know what you are buying.2)  Use an outside third party servicing agent to collect and service the payments from the payor and then disburse payments to your IRA and the partner.3) Have the assignment of mortgage (AOM) and note endorsement/allonge go into your IRAs name (or the trust vehicle used for your IRA).4) Have a written agreement with your partner.Working with partners can be great.... until it's not. 

@Dina HarlethWhile possible, that LLC will lose its privacy once it comes to do business in California and must therefore register in California to be compliant with state law.A trust will be a better vehicle for your goal.