i have a very unique situation with a seller, that i need some assistance with.The owner of the property would like to sell; he has it as a rental arbitrage and that guy is renting out the 3 units.

Thank you for your advice, with my unique situation I'll need to find the right people to work with. 

Before signing a lease agreement, conducting a thorough screening process can help mitigate potential risks and ensure you're selecting reliable tenants.

Speaking of appraisals..Unless it is a very low LTV or unique program/borrower most lenders will require a third party assessment of valuation or appraisal prior to providing a mortgage.

To avoid going through the same poor experience, keep reading.Even if someone gives you a referral here, do NOT make the mistake of assuming that the PMC will meet your expectations, just because they met the expectations of the referral source.In our experience, the #1 mistake owners make when selecting a Property Management Company (PMC) is ASSUMING instead of CONFIRMING.It's often a case of not doing enough research, as they don't know what they don't know!

I have a unique situation where an elder lady wants to gift me her house.

There are some states (like NH) with some unique issues as well about the step up in basis of the underlying asses - where you could end up inheriting their state tax liability. 

They can either download the app or use a unique url to pay online. 

What you are describing is called adverse selection - you have a known issue and want to buy an insurance policy to fix your problem because that is less than what it would cost to have the work done and you pay directly to the trades. 

The founder is now offering a property selection newsletter to find the “best STR deals”.