We broke into the DSM market in 2014, have plowed some serious soil since.

Concrete tanks usually only last 20-25years or less depending on surrounding soil conditions.

If you are considering switching to a different heating system you will need to remove the tank and clean any contaminated soil.

Double that and you still have a healthy real estate market.  

We both have full-time jobs that generate a healthy income where we can save roughly 5k per month without giving up too much of what we enjoy (eating, drinking, travelling)I am a mason by trade and have run a general contracting business, so I have done all work to-date; however, its taxing if not full-time.  

If you have a healthy savings, job security and DTI, I see no problem with it.

Yep, and have them shoot the grade at about 1/4-1/2" a foot if possible so water doesn't run too fast washing out, use larger rock in base and fill cracks with smaller gravel....it's what we do around here....if you're guy doesn't know what he's doing, get someone who does for your terrain and soil type.

Create jobs and you have a healthy economy.

Add a healthy dose of real estate and fixed income and you're good to go.4) To add to the list Account Closed started, I really think you'll enjoy The Real Estate Game by William Poorvu.

I'm probably going to phrase the inspections as geared towards identifying any potential leaks (pipes, windows), moisture issues, etc, to protect the tenant's home, and ensure it stays safe and healthy for them and their family.