Q's about checkbook IRAs

[Gulliver R.]

Is there a Roth option for checkbook IRA? If I rollover 100% of funds from a tradition IRA (both contributions and earnings) into a checkbook IRA, Can I buy a RE property with my checkbook IRA funds regardless if the funds are from earnings and contributions? Can I pay for RE property with other funds, but have the cash flow income go into the checkbook IRA? Thank you very much! Best, Gulliver