They do offer access to conventional financial products, but is it a bit cumbersome.With a checkbook IRA LLC or Solo 401(k), you can easily establish a brokerage trading account within your plan, and therefore easily reallocate between conventional and non-traditional assets pretty much at will.

The main issue is whether the return to you cashflow wise is better if you just pay the rehab and rent it traditionally. 

They approach I really like is essentially becoming the "Digital Mayor of your Town and or City" as termed by Gary Vee.Now if you are not familiar with what that means I give you the run down What really traditional marketing would be is, *forgive me if I exaggerate a bit*,  just plastering yourself in everyone's mind as, that's Joe the real estate agent, he seems to be everywhere I go. 

For years, I was thinking I'd roll the entire amount into my Traditional IRA as I could defer taxes.

When I address FSBOs I'm coming from the investor standpoint to purchase their property through one of the above mentioned strategies.BUT, if they don't like those options, I can always be put on the back burner for a traditional listing when need be!

I'm good with strategies 1 or 4, and I think they offer many advantages over the traditional forms of borrowing. 

The seller probably thinks you Can’t get traditional commercial financing.....find out if you can then present an offer with a preapproval.

find a properties that would be difficult to finance with traditional lenders because of condition or class of property i.e. zoning or use.

@Jon Ankenbauer - Unfortunately traditional lenders will not go for this sort of deal.

At the same time, real estate has been overlooked by many traditional financial planners, who don't understand it or haven't been trained in it.