So is it a matter or reaching out to lenders saying I'm willing and able to act as a broker and ask for their terms/rules?

You got some solid advice above check with your lender and get in contact with an attorney like @Bob Floss II who can help setup the OA.Assuming there is no pushback from your lender, you should be able to do a quit claim deed to retitle. 

When you tell them they will only get paid when the loan closes, they will disappear.If required, the only money you should ever send to the lender is for a credit check.

Yes, I'm a lender, but we have an arm that's been investing for close to 20 years now.

You would need to let them know you are 2nd lender and want to pay the loan off.

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

But to your point, a current project I’m about to start, I can tell you I had to push back on ARR as the comps used by lenders were entirely outside of what I’m bringing to market.

If you are skilled in each of the areas above, and you have enough in reserves to cover the costs of when things do not go as planned, then you can likely attract money from private money lenders who want to get a return on their money and they see lending to you as a low risk way of earning a better return than in the other passive investing options they have. 

I found the son on Facebook and sent a quick intro giving my condolences, expressed my interest in purchasing the property, and provided my phone # in case he decides to follow up.I'm in the process of preapproval with a couple lenders, and have reached out to a couple realtors in my area to see which may be a good fit.

What would be my best approach, I assume find a private lender and work out some deal with them.