A sensitivity analysis does help a lot here and there are some key variables that dominate many models; like rents, vacancies, etc.

If there's a hole, it may be a red flag.b) sensitivity analysis: I examine all the assumptions, and make sure I can live with the worst case scenarios.c) "Stall and see": if they are getting money over multiple years, and there is no penalty for investing later, I would usually wait so I get some real performance data, versus having to look at theoretical pro forma information.d) Recession stress test: I will not invest in anything, until I subject it to recession level stress and see if I can live with the result.

These types of programs are better suited for investments that are more time sensitive or transaction intensive in nature such as ownership of property, tax liens and the like - or even just a portfolio with multiple static assets. 

Even at B class (Rent $1400-1600) income and background checks rule.I require 4 rents income with low FICO, and only 3 - with decent score.Eviction is much more sensitive subject than credit, even if it happen 5-7 years ago.

You were prepared to spend the money but they weren’t, if it was known it was soap scum they might’ve elected to clean it themselves, and I’m always sensitive to the fact that a tenant’s finances might not have much flex.

@Josh Thomas I would want to see a much more robust economic analysis, including workable excel sheets with sensitivity analysis.

@James York PM people directly if you have a question about something that may be sensitive.

Sales are increasingly sensitive to price and we continue to see the occasional obnoxious overvaluation that could offer an opportunity others are overlooking. 

Line up your potential purchases in priority and start makingshort and time sensitive offers.

In a subdivision we built, we were hung up over a year while the Army Corp of Engineers and the City fought over whether or not a gate should go in a fence around 'sensitive' ground (a gully).