The principal / consumer is not protected in an  agency contract.   

I’ve talked to my CPA and attorney and have ironed out good partnership agreements.

These all have to be ironed out before entering the partnership.

The research it’s time and cost consuming,and a lot of property’s can be redeem , right before the auction.If you pay for a title search on so many properties ,that cost can go up really fast.I’m trying to find a different way other then a title search or county records (like an online website )more cost effective and time efficient to do those investigations.Any suggestions are much appreciated

ACH regulations give the consumer an option to dispute fraudulent charges and reverse payment.

Given this is an older house that won't be sellable in a not-hot market, and will likely have issues down the line relating to its age, should we strike while the iron is hot and sell now, take profits, and plan our next flip more cautiously, or should we continue renting given the stable tenant and good rents in the area?

Evictions are costly, time consuming and stressful.

Even simple rehabs, like painting are time consuming and can be draining.

The fact that you have an income generating property, no "consumer debt" like credit cards or car loans, no student debt (I'm assuming) and you have an income, this should qualify your for conventional financing.

We were just action oriented and even if we lost money, we treated these units as a mini pension, so when we pay off in next 20 years, it’ll just pay us a steady flow of income vs. us wasting money on consumer stuff since we are natural spenders.