Private Lending in SDIRA: Traditional vs Roth?

[Ray Li]

I'm considering setting up SDIRA LLC for doing private lending. Seems like that's the best way to invest that while avoid UBIT.

My IRA money is in a traditional IRA right now.

I know the main decision factor between leaving the money in traditional IRA vs converting to Roth is based on how much I expect my tax rate to be when I'm 65 vs my tax rate now. But is one of them better than the other, strictly with respect to the investment method (interest income from private lending)?

Also does anyone have any checkbook IRA LLC they recommend? I think I've seen some people using IRA Services.

Thanks,

Ray