Google Sheets or Excel can keep track of things pretty easily if you just stay on top of updating them.   

Properties that are easily accessible tend to be more attractive to renters and buyers, which can result in higher property values and rental income.Demographic TrendsThe demographic trends of a particular location, such as population growth and age distribution, can impact the demand for housing and rental properties.

I am aware SBA loans are not as easily found so hopefully there's someone on here that do provide SBA financing services.

You can judge the demand fairly easily. 

Up 50% easily in a lot of places.

Home buyers are very easily visually influenced.

Additionally, cash flow can easily disappear if you need to repair a roof or HVAC system.

Looking at Zillow, I can easily find comparable properties in the area that were sold for less - with a bit of cherrypicking I can find examples going for 30-35% less2.

Listings scale super easily so we're able to service 4 or 5 one percent listings in less time than it takes to service one 3% face-to-face listing.

It is a compliment to say she could do something quickly and easily that your broker said was impossible.