I do know that is something different than STR insurance.Thanks for letting me know that so when I call all the insurers I can get accurate info.I don't think your agent knows what they are talking about or they don't have the correct info.I am not against crazy ideas, but this isn't that.

I would start with narrowing down a location and property type and then making sure you are connected with a lender so you are running your numbers with accurate data.

You should know the target investment area well enough to quickly recognize actual deals versus those that are not going to be profitable.You should then have a team in place that can quickly validate the condition of the property and give a decently accurate estimate of repairs. 

As the others have said, you're over-analyzing this.....a) if your competition has an amenity, you had better have it too, b) there is no way to accurately determine the ROI, and it's too easy to just take a flying guess at it anyway....In my very humble opinion, do not over think Real Estate, it's not necessary and this a a seat-of-your-pants game anyway...

It sounds like it is too late for you, but you could have conducted a separate test with another provider as a check to see if the first test was accurate or not (had the builder pay for it). 

Does this look accurate in your experience?

However, make sure to call around multiple management companies to ensure the estimated rent is accurate. 

Let me first provide you with an accurate and honest one-liner to summarize what to expect if you decide to work with WealthAbility followed by a detailed account of my own personal experience with the company.

@Kiersten Vogt there is 0 chance I would gamble with what around here is a $35-40k issue.

@Martin BrownAlso the reality is if you are trying to forecast numbers, the second you hit enter they are wrong as nothing goes the way you modeled it.The important thing to consider when modeling is to have data as accurate as possible (garbage in garbage out), but most importantly (and this is where investors miss the boat), what is the sensitivity to the numbersFor example if doing a flip with hard money, which causes more pain - $20k more to complete, 25k less in sales price or getting the right number but it takes 3 months longer?