Since I'm not an attorney and can't give legal advice, I did a little more digging and found the passage below.

Out of the 20 letters I've sent, I've had 1 guy get back to me and we were in discussions but weren't able to find a price that worked for the both of us.The issue is that I only have a few houses on my mailing list so far (just places I've walked or driven by that caught my attention), and blindly searching every street and address # to see which houses are actually legal multifamily will take forever and doesn't seem efficient.I know the data is publicly available, I just don't know how to aggregate it in a way that would be efficient and useful for blasting out marketing mailers.Are there any websites that can pull massive lists of all multifamily houses in my area?

It’s your property and you can sell it FIBO, with an agent, by any other legal means, or give it to the ASPCA.

Without proper permits, there’s a chance the city may request you to revert any non-compliant additions (like the extra bathroom) to align with code standards.When it comes to refinancing, banks tend to look closely at the property’s legal compliance.

Just make sure you have a great contracting crew in place before you take on any value add type investing.

For both short- and mid-term investors, the market's diversity and relatively lower entry costs make it an attractive option.FYI - Philadelphia has a tenant-friendly legal environment, which can present certain challenges for landlords

4) Legal Options: who told you that you can't sue the LLC owner?

Example- A real deal that we are working on right now: A Homeowner wants to sell their house for $170K and is open to doing a subject to or contract for deed. 

First, both parties have to agree to terminating the contract and then they need to sign a termination agreement.

After resale costs of commission, legal fees, and capital gains if the sale is in the 6's I might make 200 basis point spread profit.