the old leases run with the property and are as valid with the old owners signature, as though you had signed it yourself. you can both sign an addendum stating that ownership has changed, but that would be redundant from a contract perspective. more importantly, before taking possession, you want an estoppel agreement signed by current owner and tenant which agrees to the current rents, deposits, and contract terms. otherwise you can take possession and tenant can claim he has prepaid rent for next 3 month or old owner verbally agreed to let him have 5 large dogs.

@Bola A  I will look at various websites,  including ones regarding population,  biggest employers, income, crime and home ownership. 

Also, please note this hasn't actually been determined as the cause of their leak.

Value is the lesser of purchase price or appraisal number.On a refinance six months after purchase, only appraised value is used to determine LTV.Also, there are no 95% LTV investment property mortgages on the market at present. 

Once completed, refinancing into a traditional mortgage (still determining the which/time/rate on that piece).. 

You need to research your own area to determine the best path to invest.

ARV will be determined by looking at comparable sales in the area.

Get your account current for your period of ownership. 

When I bought the duplex, it was under joint ownership, and sold through a court appointed commissioner.

Market determines price.