You're legally bound only by the agreement you've signed with your agent. 

Aamna,All DSCR loans require either current rental agreements/Leases or they use the appraisals 1007/rent schedule. 

The preexisting rental agreement is way under market value for a 2/2 at 917 Sq ft.

I'm not familiar with the intricacies of section 8, but have you gone and done a walk through of the unit and cross referenced the lease agreement? 

This protects you if the lender/seller passes away or would try to sell the property out from under you and your seller finance agreement.

I've made the below change to the New Landlord Transition letter and will now work on the Estoppel Agreement form that will go along with said-letter:++++++++I have included with this letter a Tenant Estoppel Certificate for you to fill out.

FYI-  for a long term rental, a lender will consider the income right away (75%) if there is a signed lease agreement or an appraiser' estimate STR/MTR Income Must Show Up On Your Tax Returns- Before a lender can recognize that income for underwriting to offset your DTI, they must see it reported on a schedule E on your most recent tax returns. 

If not, you likely must honor current lease terms unless tenant agreeable - read lease as it may have early termination agreement. 3) your contract and/or settlement statement should show security deposit transfer agreement.

Buyer's Broker agreements are much like a listing agreements - they can be exclusive or not, as follows:   - They can be an entirely exclusive agreement, as you've indicated in your initial post

He also saved me a good amount of money in attorney fees, he provides resources like lease agreements, construction agreements and seller financing contracts, these cost a pretty penny to structure with an attorney.