It's like in the show "Breaking Bad" where they have a pallet of money in a storage unit and the wife goes in to spray so the bugs don't eat it all.

Call Terminix and have them come spray the house for like $130 or so.

I'm new enough to investing where you'll have to take my opinion with a grain of salt. 

I started by rolling but had to use a brush to paint the groves - I gave that up after priming and sprayed the rest fairly quickly.

The Hohokam people who lived in the area of what is now Phoenix from around 300-1500 AD had an elaborate system of canals and irrigation ditches from the Salt and Gila rivers.

Take everything he says with a grain of salt and don’t get bent out of shape if it doesn’t fit your life choices.

I’m sure I’d stock up on pepper spray or something more useful.

Tell them firmly how it's going to be done and no BS demands.One of my tenant wanted ants sprayed by most expensive company around here, I said - if she pays for that, I can even subscribe for a year of their services.

So take it with a grain of salt, just do what works for your own investment profile, personal and financial goals and you will do just fine without any specific ratio limits set by someone named Dave Ramsey.

Takes the pest control guy to come spray a couple times and its good.