What to do with 80K every other year.

[Adam Evenstad]

I want to supplement my family's current investments with real estate. The ultimate goal is to retire from my 9-5 within the next 18 years. My current take home income is roughly 4k per month from my job. I currently like the idea of the buy and hold strategy. I will have roughly 80K to invest in real estate every other year. My question is what would experienced people suggest if they had those funds available? I want to pay cash, and avoid leverage to limit my risk, and am definately considering using a PM. Any, and all thoughts are welcome. Thank you.