I'm self-employed and did not know if my business was going to be shut down due to the virus.

I do not understand your remark as related to the DSCR loan.  2 ADUs are not allowed by f/f conventional financing but is not always enforced.Fortunately if you stay with the current tenant without a refi, by the time you pay principle it is likely the rent will have increased enough to absorb the increase mortgage payment. 

Certain areas are not allowing them.  

Non-renewal notice sent today and posted on their door, allowing for them to leave anytime between Feb 1 and March 31 with a refund of their rent on a per diem basis (if they've paid for that month). 

I’m new to the rental business.

I typically don't comment on other's businesses unless I know from personal experience.

They have a list of vendors that want to keep them happy because of all the business they do.

Hey Max my business partner and I are agents and investors here in Phoenix ourselves.

Do you have any standards that you follow to help you in business?

The webpage has them based in Maryland but they aren't listed in the state's business directory.