Don’t want all of my insurance policies to go up or deal with the hassle due to this neighbors negligence.Worth hiring a lawyer to send a demand letter?

Its pretty outrageous if this contract is legal. 

Quote from @Piper Pepperidge: Looking to do my first flip, was originally looking at baltimore, but it looks like it's moving towards a buyer's market and inventory is very high so I'm looking for other hot neighbors with low inventory.ThanksHottest markets are inner ring dc suburbs, moco, nova, even Howard and Frederick, I can tell though if you are a 1st time flipper you will lose money, I’ve been doing this for nearly a decade and I cannot hit my numbers, I met with a flipper a few weeks doing 12 a month, has his own crews, buys off market, literally a full time business, even he is struggling , it’s a bad time to flip right now tbh. 

Good Renters hard to find in this neighborhood.5.

I had several other investors lined up interested in this deal...

I've been involved on this forum for close to a decade now. 

Is there any websites or platforms that I can add to my knowledge that help with this diligence at fair/free cost?

This gave me the opportunity to meet the girl of my dreams. 

To start house hacking, research neighborhoods like Lawrenceville, Bloomfield, and South Side, while for multifamily investing, consider East Liberty, Squirrel Hill, and surrounding suburbs.

Now they are writing back informing me that he's been registered as ESA.