As the saying goes, "in a gold rush, be the guy selling picks and shovels".

Replace furniture at the first sign that it's getting rickety or soiled.If I was self-managing, I would try to buy something within two hours of where I live.

First of all, you picked a great PM with WHM - Ed has been running a very good business for a long time! 

Pick one forum where your question makes the most sense.

Your best bet is to find someone doing the work in your area and picking his/her brain. 

I live in MN and fully trusted my original realtor when he said it was a great area and I bought right after the hurricane so every corner had garbage and debris waiting for city pick up, now a year removed, it's much clearer that my neighbors are not interested in cleaning up their properties as other areas are now. 

However, if the furniture is infested, you probably need to replace affected mattresses and couches.

I've heard of mentees who started cleaning up construction areas on a flip at the end of each work day or picking up supplies at Home Depot and delivering them to the job site.

That leaves a grey area in between, what if you are not swinging a hammer, but just picking up trash in the yard as you walk by?

Last time I was there, the indigineous people would pick the beans. $5 for a 5 gallon bucket full.