Just a few other issues to contemplate about owning real estate in the IRA...
Think of all the things you do as a property owner that now a custodian/trustee of the IRA will be responsible for. Ensure taxes are paid, insurance, property maintained, tenants, gas and electric, etc. They can do this themselves or hire a firm to do it. Who pays for all of this! The IRA of course. Evict a tenant? You guessed it...either the cust/ttee intervenes or hires someone (at the IRA's expense).
Sure the cust/ttee can contract with the account holder, but the ultimate responsibility lies with the property owner who, of course, would be sued if someone fell on the property because it wasn't shoveled. Think of the headlines and have fun