You could read 100 books and still not know enough because certain things must be learned through trial and error.

Was it basically trial and error or did you go in with a documented plan?

I can concede this may have been done at error.

I would use this report to get a credit and plan for maintenance items to come up sooner rather than later due to installation error on the new work. 

Make sure it's great--that gives you plenty of room for error.  

Just went into contract on a home (3 bedroom/2 bath with an outbuilding in the backyard with power) yesterday before doing solid number calculations (I relied heavily on my agent making the mistake of not doing my own due diligence, even as a rookie, I should have known better!). 

I also bought it with a tenant in place and for me that was a rookie mistake.

I recently finished the Rookie Bootcamp with Tyler & Ashley and I'm excited to get started. 

You had gains according to your tax return (and as others said, perhaps depreciation recapture or perhaps preparer error or perhaps you don't fully understand your tax return).Your loan has nothing to do with gains.

Make sure you understand what the searchers liability is for errors or omissions which believe it or not, do happen, all the time.