Not only would you benefit from having a partner's input on the deal, but you would also have an experienced individual to work alongside with as you navigate the project.It's also important to make sure you have identified your "team" ie; contractors / realtors / lenders / insurance agents / title company / etc. 

We are both highly dedicated and ambitious individuals with a strong desire for personal and professional growth.

According to the brokerage and agent, these individuals either weren’t serious or claimed they didn’t realize the property was occupied, even though it was clearly stated in the listing.I’m not particularly concerned about the property’s condition or the eviction process, as I’ve already secured some level of cooperation and have basic access to the basement.

If I was the owner I would be asking why is it not published in the NY times, or other publications that have high net worth individuals.

For existing companies, individuals who own at least 25% of the entity or exercise substantial control over it must submit BOIR to the Financial Crimes Enforcement Network (FinCEN) by December 31, 2024.

If I were to go this route I would clearly identify each of these risks individually, understand how the Govt would potentially challenge each of them and then assess in your particular fact pattern how you would effectively rebut a challenge to each. 

It feels like everyone and their grandma is on the Do Not Call list nowadays and my worry is the fines associated with accidently calling these individuals. 

If not, you can always increase the rent to market value, but my guess is it being California, there are limits to rent increases.There are rent caps but they do not apply to single family homes owned by individuals (not LLCs or Corps) 

I would assume that you'd just simply sell each individual lot to the developer at a set lot price such that your cost to purchase the raw land and improve it to buildable lots was worth the proposed profit per lot.  

If the US government, or a future world superpower does not like Bitcoin, it can require individuals to use its primary currency.