Basically just putting a step in the middle of a disallowed transaction that is really only there with no actual profit/business/clean motive except tax avoidance...is not valid. 

She sent me a letter from Commercial Property Advisors, Peter Harris, which stated she had approval for funds sufficient to cover the purchase price and below it listed a Wells Fargo business account showing funds in excess of the purchase price.

If a HELOC isn’t an option, alternatives like a home equity loan, business line of credit, or a DSCR loan could work depending on your situation.

I inherited a partnership in a 22 unit commercial building with 8 restaurants, a grocery store, a couple of personal care services, and various other businesses.

if anything then I would set a flat fee to pay them for their service and then if you do find a property that offers buyers agents money, in which almost all I have seen still do...then I would have the title company back out the amount you decided on and the agent gets the remainder of the amount of commission that's left over. 

What broker would sponsor me considering I'm not intending to become a full time Realtor and give them regular business?

It'd be overkill for many small businesses to pay for a lot of horsepower.

It's just business.

Was the business credit enough to put towards a deal? 

If you want cash flow, start or buy a business.