In a nutshell, you charge your tenants for water based on a set formula.

IMO that would be a violation of Fair Housing based on familial status.The usual formulas for number of occupants are:2 x number of bedrooms(2 x number of bedrooms) + 1The one at the end is to allow for sleeping on the sofa ;)So a 3BR house would sleep 6 or 7.

Do a search for "The Flip Formula" to see what I recommend...

The formula to get that ratio is Net Operating Income  divide by debt service.

However from my understanding we can use this formula as many times as we want and then roll the current property over to a portfolio loan once there is enough equity.

And oftentimes, as I’ve found out there is no ONE formula for deducing these assumptions.

I keep this on Google Drive and can access the information from anywhere at any time.I believe you have to open the file in Excel to get the formulas to recalculate, however you could put an entire amortization schedule in Excel if you absolutely need to know.

This formula (good school + dense population) worked well in Marietta, but I'm still figuring out the market in Charleston.

Sorry if this is you but I don't understand how a wholesaler can bring a deal nearly $100k OVER the "optimal formula" for a fix and flip (ARV * 70%- repairs= offer) on a $500 ARV property. 

As long as I can anticipate those expenses (taxes or otherwise) from the outset and the formulas spit out a positive result before making a move -- I should not get too anxious about UDFI taxation - especially if it allows for leveraging, higher cash-on-cash, etc.Thanks!!