I am looking on possibly doing my first flip here's the details:3 bed 1.5 bath 1200 sf ranch with semi finished basement at foreclosure asking 70k really only needs paint,carpet and landscaping.

All in costs for my house (not including the principal payments I've been making for two years) is about $10,000 (down payment plus upgrades).So, I can rent it for $1,400/month, and after PITI and landscaping, monthly cash flow is $100 or 12% annual cash flow. 

Also, does the system have an expansion tank?

I have a landscaping business, and I'm usually riding through several of my targeted markets constantly, in addition to just driving the other vehicles all over the place, so this will give me great exposure to drive leads for my company as well.

Expenses tend to go down each year as we do major work in first few years of each property (roofs, generators, landscaping, troubleshooting). 

The landscaping had been neglected for years so it needed major pruning. 

Is it written into your lease that the tenant must maintain the landscape? 

It definitely needs landscaping - fencing would attract families. 

Cover that open portion with a panel, landscaping (just hide it with tree or shrubs), open it up totally for a garden, etc. ....

If you have 2 properties and are still in the "expansion stage", I would not pay off your mortgages more quickly.