I have a lease agreement with a tenant who moved his wife into the house shortly after signing the lease. 

I just switched my PM and right now i pay 7% , leasing fee of $300 and $100 renewal fee.

Owner is trying to sell since he is older and looking to retire. 100% occupied with leases through December of 2018-Purchase price: $105,000-Monthly rent: $2250-Annual Tax: $1154($96.00monthly)-Annual Insurance: $ 1275( $106 monthly) -Property Management : 8% $180.00 monthly-Rents are currently about 10% below market value. 

I'm looking to learn about Lease Options deals I'm in the Washington DC area (DMV) so I know laws are different all across the country.

If the borrower does not have a history of renting the subject property or if, in certain cases, the tax returns do not accurately reflect the ongoing income and expenses of the property, the lender may be justified in using a fully executed current lease agreement.

I have a family currently renting one of my properties that had asked for the option to renew the lease for the first year.

Check your lease, unless there is a kick out clause upon the sale of the property the new owner has to honor the full term of the lease.  

The bank I used believed this rule wasn't applicable because once most leases were up after 1 year a number of tenants would be moving out. 

I have a 3bdr 1 bath under a lease with an option to buy. 

They mentioned about wanting to re-up their currently lease by signing a long-term lease.