I have airdna data but just from 2020/21.

Most note investors are looking for quick data sheet to run numbers rather than a pretty UI.  

MLS has a ton of stats that they share with you and that you can compile yourself i.e. sold data, new listing data, buyer demand/DOM, historical data, etc.2. improve sales skills.

Some investors prefer buying properties personally and transferring them into the LLC.

The closing date is the date means when you close and when payments from the borrower would transfer hands.

As for the refinance aspect, if you're going from LLC to individual (or vice versa), at my shop you would just transfer title into (or out of) your LLC at the close of escrow, so that part is no biggie.

Hello,I was looking over data for a tax lien sale for Phiadelphia, PA.

It seems like a great platform (they call the sellers and vet the leads for you, then transfer the call so that you can try to work on acquiring the property).

Same reason you have someone handle the mortgage, title transfer, inspection, etc.

I would first contact your mortgage holder to figure out the process to transfer the debt to an LLC.