The "closing" was just done at the bank and we signed paperwork with the banker so no closing company involved. 

You find the list, track down the person by skip tracing or some other method. 

So I was thinking that a system like RUBS, if not generally applied in the area, would increase paranoia and increase turnover, besides the additional work and expense involved in billing, getting the bills out, and collecting it.

It's not that easy to accomplish and usually involves advanced strategies such as bonus depreciation mentioned by @Logan Allec and asset segregation.The good part is that investor-friendly lenders will add back depreciation, not counting it against your income for underwriting purposes.

Hello Matt,In the institutional investor world the method used to manage turn cost was $ per sqft. 

The biggest benefit to this method is you get to keep your incredibly low primary residence interest rate of probably 4.25%. 

First time being involved with commercial sale.

I know that doesn't take into account the finish/quality of the homes, but is that method generally accurate? 

I used that method and have explained it in more detail in other threads or in a book.Moment number two – as a broker, I began doing real estate syndications and raising money.

I haven’t used BP to it’s best potential but I plan on it, as I’m getting further involved in real estate investing.