If it's a matter of a quarter point but the more expensive debt is with a bank that offers better other terms like amortization and LTV, and they have a rock star loan officer, I'd go with the slightly higher interest rate product.2.)

Reputation matters for your offers in the future and can be the difference between getting a deal and losing it, will either of these lenders help more with that over the other?

Finding a competent attorney to work with is a matter of interviewing several and picking one.

You have to talk to the sponsor to find out the details on each particular deal. 1b) And the asset class matters too. 

However, DSCR Loans are also strictly for business purpose only, so don't work for house hacking (can't live in any of the units) and if refinancing into DSCR, would have to have moved out and well documented a new residence if you go that routeAs an out-of-state investor from California, should I work with lenders in California, lenders in the Midwest where I’m investing, or does it not matter as long as they can lend?

If you are investing in a distant market there should be even greater reasoning behind the investment because you have less control and therefore even greater risk no matter what anybody tries telling you. 

If anyone is interested in pursuing this matter please reach out.

I'm not saying that you need stick around with someone no matter how bad they are, just that you need to be mindful on your projects going forward. 

I would not make this a legal matter, but you will have to decide if you want to commit to living with this landlord.

It will only be a matter of time before there is a valley or a dip, that is part of being in business.