A rental license typically requires a home inspection looking for code compliance and safety issues. 

If you had a baby and homeless people are ending up on your porch, that is a safety issue.

What are the safety code implications of one meter ?

If you have a split floor plan it makes it less ideal due to safety issues (stairs) and supervision issues.

In all cases the process will be the same: Zoning, plan check, and building and safety. 

Tenent is now concerned about safety issues and has a newborn in the house and it is los 30 degrees.

In no small part because people who know nothing about real estate are now in real estate as there is simply no other asset with the perceived safety of real estate than can provide any type of reasonable return.

If you can afford the negative cashflow and have a safety net/reserves, then negative cashflow is just part of the long term investment. 

Aloha,I am less than impressed with cellphone and laptop fingerprint readers as well, but we have many MF properties that use proximity readers you can wave a keychain fob the size of a quarter in front of for access, VERY reliably.

Sec 8 also does a property tour and flags various safety issues (confirming smoke, co alarms, etc) so could get an advance list to make sure items are all done or you have no concerns about passing the basic inspection before getting too far down the road with an interested sec 8 tenant.