There are an increasing number of bigger players looking toward Memphis for similar reasons you are.

Keep in mind that the bank's role is limited to simply providing the account (i.e. no tax reporting, no recordkeeping, etc.) such you may wish to de-prioritize familiarity with Solo 401k plans and focus on other things that are important to you (i.e. branch locations, fees, etc.).If you want the ability to invest in stocks, mutual funds, etc., you will need a brokerage account.

Big national or regional players know their impact as an anchor and will have limits on how much property taxes (they immediately go up as you laids more that the seller), hvac R&M, parking lot care, roof, etc…

This is why you see a lot of the big players that have integrated their rental operations into a property management operation. 

You can do this through REIA meetups, setting up keyword alerts, and just sending messages to active players in your market. 

Also that gray area often gets defined by the player's negotiation skills.  

Have a great group of service companies that will prioritize your call.

@Corina Eufinger makes a great point about the polarizing effects your name could have.The positive side of that is that if I'm looking to invest in Austin and I see buyfastAustin I know that you're a dedicated player in the market rather than just a large broker looking to move anything they can. 

The lender's investor is Chase, who he says is enforcing that $1M limit and as a big player their limit is likely a standard.

So when a tenant is late my business  model prioritizes how to prevent the situation from resulting in tenant turnover.