He sent me a letter stating the forfeiture for that reason as well and did not list any damage.

Will I be stuck with a home in which I will need to obtain permits for this past work ?

To answer your question about the downside or risks - there might be an existing or a possible lawsuit and you would need to be held liable for 50% of it.

Now I'm shopping around for an attorney to proceed. 

I know how to get fantastically accurate estimates for simple single-family deals but was wondering if anyone had advice on where to start for running numbers for 50+ unit deals.Also, if anyone has any advice on helpful systems and technology - or for managing larger scale real estate businesses to be a valuable partner, I'd gladly listen. 

Nevertheless, this conversation will need to be had with the seller for clarity.

Let me give a brief background for the context of my question.I’ve been investing in real estate for the last 14 years but more actively for the last eight years.

I’m looking to partways with it and sell for a smart price.

Thank you for all the responses. 

If you're counting on wholesalers for success you're screwed.