I don't mind paying for a market research subscription that's worth the cost.

problem is now a days with inflation and overall costs travelers tend to want to save money.

It actually doesn't matter if you are purchasing for cash or financing - it matters how much the purchase + reno will cost compared to the after repair value.

Also, there are other costs to consider when doing these other strategies. 

Also, we plan to make the farmhouse and growing building/s nearly net zero, which will lower cost of utilities to zero.

Renovations are high cost items 

Value add, which means a non-performing asset wouldn't even achieve a yield on cost of 7% after rehab and brining it up to performing status in Dallas.

Do I need a *business* checking account to accept rent payments and pay for maintenance/repair costs as they arise?

They might cut corners on essential structural or system repairs, leading to hidden issues that can be costly to fix later.2.

It will be self managed, I will be near the unit (less than 5 mins away) to clean and take care of any issues.My numbers:Approx Value of Home $240-280kCurrent monthly cost / $860 mo (mortg,ins,tax)Utilities / $250. mo (elec,gas,water,trash,internet)Cost to run as AirbnbApprox monthly cost with STR insurance ($250/mo?)