Sometimes it is best to pull the band aid off quickly. 

So today, I decided to create a rental property calculator from scratch in google sheet or to be sincere, I'm yet to save all up for the PRO member fee.

Do some research beforehand and google them and see what you find. 

I hadn't thought about personal websites showing up on Google Maps.

You should do a google search for 'instrument of service,' which, I would assume is what you got from the architect.

You should skim through some of my online content about this (I make videos for NYC househackers) on my pages - just google ClosedByMo. 

Unless you live in a state where deposits have to be kept in a separate account (google) I would open 1 business account and a credit card for the rental property. 

Then the next time you need to hire a plumber, you just go to your list instead of starting over with a Google search.Finally, regarding neighborhood insights, if you're not using an agent, and don't find another boots-on-the-ground type person in your area, networking is the way to go.

google amortization table and you can play with the interest rate, term, months etc. to make it fit what you are trying to accomplish

Google up STR property managers in that area and choose one, after interviewing them.