Higher-quality areas attract tenants who are more reliable and tend to take better care of the property.

This is the list to not invest in without extreme careful attention to detail.Don't go where the masses are going.

Just make sure to vet them carefully and ask for references from past deals and proof of their track record.

Also I dont know the state of the house ie is it completely derelict and trashed or what not, as previously stated i dont care about the house, just the land.

If the above is true, the income will offset the debt in the DTI calculation, so who cares? 

Quote from @Jimmy Rojas: Thanks for the reply, i think it may not be worth it after all, may I ask did you use a calculation app to come up with the mostly payments, if so, care to share it with me.One more thing.

For residential multifamily properties (1 - 4 units), can you use a home warranty to take care of the repair costs associated with rentals?

Gotta have some skin in the game. 

I could care less if someone smokes marijuana but worried it might impact other tenants & future renters.What are my options, if any?

I have to pressure them to take care of it.