Just not very accurate.

I have gone through scenario after scenario and feel like I am not getting accurate numbers to go off of. 

How accurate is this today and in the next ten years with inflation?

Assuming that 5k new home is accurate and say it takes...10 year(?)

Then, and only then, will you get an accurate cost to build "your home".2 - There are a number of different "residential" zoning types. 

@Michael SheaRecommend 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, 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.

@Jake LangleyRecommend 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, 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.

By no means would these be exact estimates and they should not be solely relied on but with high level information, I think most sponsors would agree that they could provide feedback fairly accurate assessments within +/- 5%. 

Though it is over 50% cheaperin my market, the price came in about the same although Reonomy isn't market-based but is limited with contact search, Reonomy has loan maturity data which co-star is lacking which is a big upside. costar has leasing data and is  also more accurate. 

I've had constant issues on the backend with reservation data not accurately transferring over to my PMS, and it takes them weeks to rectify anything that is not a simple fix.