It comes from signing services which only pay between $70-$85 per signing while they get paid $125-$150 total on average and upwards of $400.

After doing this, I then run the property through Airdna.co and/or Mashvisor.com Both of these tools will give you projections of what type of rental rates, price per night, bookings, occupancy, seasonal variations, etc.

Of course, no one knows for sure, but it seems the FED deferred interest rate decreased.The location of the new construction is so appealing due to being close to downtown (10 minutes).What would you do?

Too many people from California moving here (estimated 80k per year) and they are willing to pay more and get nicer homes.

I would agree that this fee seems reasonable for your personal return including the three properties. 

Look at how much they make per pay period4.

Additionally, I see a third house only 18 minutes and 11.8 miles outside of my city; this particular "Open House" is Sunday 1:00p-3:00p, and it's advertised for $195,000.

I opted for a flat fee brokerage instead because keeping my commission was more important to me.

What kind of rent to price ratios would make more sense in the NPR area per your experience? 

Typically they can get their fees out of the seller.