at the point where you bid on assets you only have a few bits of data on the fc, not the whole picture.

I found listsource.com and I think it is interesting how much data is available. 

Cash flow is also based on multiple assumptions that you are either using historical data or you're guessing. 

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.

Some cpas prefer quickbooks as they can import data directly but it’s overkill fro most landlords. 

City Data seems to work pretty well for me.

If I run on current data, I come up with one offer, and different scenarios yield different offers.

Indoor RV and boat storage - easy conversion and your location on the way to Canyon Lake would be ideal.Talk to all the data storage companies in Austin and San Antonio about space for server farms.

Lazy data entry. 

You can do this on redfin, zillow or just have your realtor pull comps from MLS data.