I don't like that their website only talks about "project level returns".  

Every time I enter into an agreement to purchase I have the following: Exclusive irrevocable possession and occupancy shall be delivered to Buyer, Buyer’s Assignees, or Buyer’s Agents at 5:00 PM on  the date this agreement is signed by Seller,  on the date of Close of Escrow,  on ________________, 20______ or  no later than ___________ days after Close of Escrow.I have collected my fair share of cash for keys in SS where the lender tries playing God.  

Are there any good materials (books, websites, etc.) you might recommend? 

Searching the Local GIS and county websites.

Searching the Local GIS and county websites.

They claim to work with several banks, investors etc. their website platform and BPO appears legit.  

Send or hand deliver her a written letter and talk to her personally about it. 

Ask yourself this, if someone offered to handle all of the property maintenance, watch the property, place the tenant, handle rent collections, deliver rent to your bank account every month, and deal with any inspections and nuisance issues and they were asking for like $30 to $40 per week would you pay that?

I’ve seen a few websites about seminars/training, while google searching but then see reviews that aren’t so great.

If you read about transfer taxes at the PA Dept of Revenue website, you should be able to find a document with a table where you would look up that factor.