Chris,
I take a different approach. The first thing to determine is what are your current goals and objectives. Are you looking to build cash in the business now...or are you looking to build equity for the future?
You appear to be trying to compare the cash flow of a rental to the cash flow of a wholesale. Two different animals altogether. I advise my Clients to create a steady stream of cash coming into the business first with wholesales. As you do that you'll find properties that meet your rental criteria.
Then it is not about should I WS or hold this property...it is simply does it meet my rental criteria? So be sure you know what your objective is with rentals. Why are you buying them?
For me, it is not about the monthly cash flow today. I don't care about today's cash flow as wholesaling takes care of that. Rentals are about long term wealth. One of my criteria is can I escalate the payments and pay off the house in 10 years?
If so, then this may be a good candidate for a rental even though I May actually generate zero dollars in monthly cash flow for those 10 years, but then I'll have a fully paid off house...100% equity and awesome monthly cash flow.
Hope that helps.
Lou