Go to your local Real Estate Investors Association. 

Most Doctor loan programs are portfolio loans which the lender (almost always a local/regional depository institution) holds internally on their balance sheet.

Go to BUILD YOUR TEAM at the top of the screen and look for local investors or meetups in your area.

I know nothing about ME law specifically but I assume that can be done in accordance with local customs… Either by obtaining a court-certified copy of the original easement and re-recording it with all of the required signatures OR recording a confirmatory deed of easement which spells out the error and corrects it by including everyone who should have signed the original. 

Regarding property management, utilizing local property managers can save you time, and using PropStream effectively for filtering properties by distress level and location will certainly help with finding stronger deals.

., missing property taxes or HOA fees), unreliable rent estimates, and the time-consuming process of manually calculating metrics like cash flow or ROI.Platform Preference: A web-based platform would work well for in-depth analysis, but a mobile app would be crucial for on-the-go research and quick evaluations, especially when touring properties.Wish-List Features: A tool that integrates local market data (rental demand, appreciation rates, or vacancy rates) and offers scenario modeling (e.g., "What happens if I increase rents by 10%?")

The markets you are looking at - are you local to those markets? 

Quote from @Stuart Udis: The Philadelphia Housing Authority (PHA) recently acquired a 360 unit 12 story multi-family building for $24M and  a local news outlet  reported on the building.  

I'm not local to the area, and am not familiar with operating expenses for these types of projects. 

I don't have any specific contacts, but I do see several people posting on a few STR facebook groups local to Orlando, you might try there.