If these major systems can last another 5 years without causing any issues (or at least major issues) then you can plan and budget for them (would be about 300$ a month).

I think there might be a system for mortgage brokers or lenders to find my information, as I received many mails having my mortgage rate, amount, my mortgage broker's name.

You can get a fixer for cheaper but once you start having major systems get run down it can ruin your cash flow.

For example in Indiana we have mycase.in.gov. depending on where the history of the person was... is the state of public court system you need to search.

@Michael Miller Advion gel bait system!

I'd understand them, but NOT share them with your resident because, for the smart ones, it provides a nice map on how to cheat the system. https://www.hud.gov/sites/dfil...When we have a resident provide us evidence for an emotional support animal that does not meet the HUD guidelines, we simply provide them a letter that the information they provided does not meet those guidelines and encourage them to talk to their healthcare professional for more information. 

Second, not all markets are equal, and just because there is a military base does not mean the community has a diverse economic system.

Who has a system or formula that they use to decide when it's time to sell and reinvest into a higher value property or properties?

These aren't quite the grind that the first couple of deals were, but we're wondering: when do the systems take over and the business become a well oiled machine? 

On a small 1930s house do a thorough check on how the house systems were updated, roof, drainage, electric, HVAC, plumbing, etc not just the viewable interior.