It sounds like you have an un-permitted unit, which is essentially always a risk since there has been no notice to the AHJ that it exists and they can therefore initiate a code case to have it removed in most cases.

So, your focus may need to pivot from high rental cash flow to little to no cash flow as a rental with an appreciation upside.I would recommend taking your $150K to $200K and securing a solid equity position in something that will cover its expenses and maybe provide a small cash flow, but then is poised to appreciate nicely over the course of the next several years. 

One didn't make your list.1) I see people all the time raising money for real estate deals but they call it a partnership either because they are ignorant of the law or they are trying to avoid paying for all the legal work. 

There would be a lease agreement, just no monthly rent payments.

You can call suppliers, but may need very specific details to get a meaningful number.

Quote from @John Clevenger: Hey all, as more of the world is taking on AI especially in the wake of chat GPT, I'm curious what other are doing, or thinking would be cool to do in the real estate field with the integration of AI. 

If something needs tweaking, they handle it without making a fuss or dodging calls.3.

No notable issues to date - mostly minor stuff. 

Can try to reposition to Class B, but neighborhood may impede these efforts.Vacancy Est: Historically 10%, but 15-20% should be used to also cover tenant nonpayment, eviction costs & damages.Tenant Pool: majority will have FICO scores of 560-620 (approaching 22% probability of default), many blemishes, but should have no evictions in last 2 years.

As Jay pointed out all this reads of what I'd call "par for the course" in D/C class.