Am I Analyzing Deals Correctly?

[Joe Vastola]

I have started analyzing a bunch of SFH deals with the help of the BP calculators but almost all of the ones I have done (10+) have come out producing negative monthly cashflow. I want to make sure I am using the tool correctly and was just wondering what the BP community would recommended I allocate for vacancy, repairs and maintenance, cap ex and management fees? I have been putting in 5%, 10%, 10% and 10%. Additionally, I have done a good job finding property taxes and market rent for these properties but not as much luck with water, electric, and garbage. Are there estimates or websites I could use to get a more accurate and comprehensive analysis? Thanks!!