@Gp G.Recommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

@Jay LindgrenRecommend exploring as many sources as possible to get referrals AND cross-reference them to get as much accurate information as possible.Check out NARPM.com, BP’s Property Manager Finder (BiggerPockets: The Real Estate Investing Social Network), etc.Also, encourage you to learn from the mistakes of others - by reading posts here on BiggerPockets about owners not having their expectations met by their current Property Management Company.

Thank you for you time and help I would connect with a few local real estate agents and property managers in Cambridge that can pull accurate comps and tell you can compare your cost to build vs sale price. 

Lenders are now recognizing ADUs more accurately, especially as national programs like Fannie Mae and Freddie Mac incorporate them into their guidelines.

So we can't see the list but I will say that AirDNA can be accurate or not depending on the area.Like any algorithm, the more data points, the more accurate it will be (relatively).I find it to be quite optimistic.

Is this accurate?

Anyone have any advice on how I can accurately value RV Parks and Mobile Home Parks?

Is there one place to locate the accurate information by County within the State and by city within the County??

This is particularly important as I prefer to self-manage properties, and accurate cost estimations are crucial for maintaining profitability.Scalability: These rules help in maintaining a consistent evaluation metric across multiple properties and markets, aiding in scaling my portfolio systematically.That said, I understand that each investment should be evaluated on its own merits and that these rules may not capture the full picture.

Also, what other platforms are people using for rental price comparisons and have you found them useful/accurate to help you rent your home in a reasonable amount of time?