I know instead of worrying more than I should I will break down the problem into its root and go from there.

If the company comes out again, ask them how they installed it, what is the root cause of the issue, and where in the manual it says the maintenance they are suggesting you do.

You need to make offers that are low enough to cover for some unexpected problems anyway.With all of that being said, the HUD that I bought last year had a problem with tree roots clogging the field lines and the tank.

Having a duplex is great experience owning a property and being a landlord - and that's the experience you need to get under your belt you can't get by standing on the sidelines.I don't know your area and if this is an outstanding deal, but I am rooting for you to go for it and get your first step in the door of real estate investing.

I decided to put 2 in deferment for a few months due to coivd.Now, I'm ready to move on.The root of my question is that I will be doing a 1031 exchange on one and want to look ahead and be in the best shape to get a new loan.I have the cash to just pay up all missed month's.

Also remember to follow up with your leads it’s been said that on average you'll have to market to the same base for 3-6 months before you start to see your efforts take root. 

I purchased a home in November 2017 and am putting it on the market March 1st - assuming that it sells fairly quickly, I'll have owned the house for under 2 years and will have to pay capital gains taxes (for reference, CT house purchased at 91k, ~25k in repairs, listing at 170k - I'll be probably renting a place to live in myself as soon as a deal goes through, then looking to purchase a multifamily to rent out within 6 months or so, but very unlikely immediately after closing).I have a sort of two-part follow-up question about this, which is rooted in the fact that I know very little about capital gains and am feeling overwhelmed every time I try to Google/BP search the topic.

Water heater:  high end water heaters run $2800 installed, I would not be concerned about thisFurnace:  a good furnace has a useful life of 30 yearsNegative slope:  this is likely the root cause for the foundation issueKey question:  how much is the house going to worth if you repair these issues? 

The key to its strength is its long and sturdy root, which extends deep into the earth.

Best of luck to you, we're all rooting for you!