You must honor their lease but you can change who the rent checks go to.The best way to self-manage your rental is having a standard system in place. 

A landlord may not adopt a low occupancy standard if the result eliminates families with children or a protected class—20 Questions To Ask Potential Tenants:Do you currently rent, and if so, where?

This is offset by stricter MF standards, but if your stats don't fall above 25% listed rent for opex and capex (+ turnovers if using 3 buckets) based on their 20%, you can be certain you are too optimistic for a decent business plan.

I'm not aware of any guidelines or anything in the standard deed of trust that deals with that scenario, so I really have no idea. 

As you’ve discovered, even when tenants seem like decent people, you can still end up with tenants from hell.

The initial purchase will be with a standard loan with 20% downpayment. 

BUT, this was a stale deal with strong broker relationship AND very uncommon.1% is the standard I hear. 

The CES is the gold standard when it comes to analyzing the job growth of a market.

You will need 20% down for a standard conventional loan.

You want to include the standard clauses.