(ROI, Cash on Cash return, Flat dollar amount such as 40k profit/flip?

You can control the weather to some extent; building temporary roofs over building areas, but you can not stop the rain altogether preventing road construction. 

Lots of legal concerns here in NY, and for the flat $450 or whatever it's worth the peace of mind.

Louis City are not metered for water, but instead charge a flat rate depending on # of rooms and bathrooms.

Flat out, you're not in a position to be a landlord.

New home so little to no maintenance costs in first 2-3 yrsEven if rents & property prices remain flat (low probability), the increase in equity itself makes this a viable investment.

Targeting 2 or 3 flats using the BRRRR strategy, and small single families for a flip.

Now you can structure all of this into the rent - either as a flat rate, or as a percentage each month. 

@Trevor Dominique Another thing to consider is that you could do a 12% flat interest rate (seems to be standard for HMLs) That way if you are paying 7% annualized on the money in theory you could do two deals with that money over a year spread.

Some costs I certainly overlooked on my first flip: Reatlor commissions (3% if you flat fee list yourself) is 7,800.