Something that will help shed some light on this is reading Garrett Sutton's book "Start Your Own Corporation" as well as Robert Kiyosaki's "Rich Dad's Guide to Investing".  

That's the kind of talk you'll hear from every get-rich-quick guru on the planet, kind of like "7-Minute Abs" or Hydroxycut weight-loss pills.Just look at what he promises: you don't need to use your own money, you don't need to inspect the properties, you'll spend very little time on the deal, you aren't personally liable for the loans and debt, you'll work less and earn more...This can all be true if you know what you are doing.

It seems a great HVAC guy is really hard to find and worth his weight in gold in Florida. 

Think, I have FULL WEIGHT of liability on my shoulders for ANYTHING my agent's do.

This shed was over $2500 so I'm thinking it would have to be amortized as opposed to a deduction in one year. 

It's true you get a tax deduction for your mortgage, but you also pay taxes on whatever else you decide to do with that money.I would list all of your known investment opportunities, what you think the after tax returns would be, and a risk level 1-5.If paying the mortgage is a clear standout on that list on a risk/reward basis, I would spread out the $60k over a period of time and apply it to principal.You might have other goals like cashflow or reducing risk which might weight towards paydown also.

I concur with Charles, shed 5%-10% for the comps sourced from January to July.

. $400 for a 2-day rental of an 11-yard dumpster might seem high, but it’s important to consider what’s included (delivery, pickup, disposal fees) and whether there are any weight limits.Alternative Options:Bagster Bags: These are large, disposable bags that you fill with debris and arrange for pickup.Junk Removal Services: Some companies specialize in hauling away specific types of debris.

Hard to imagine a junior tiny adu was given value in a sale- an appraiser might comp it to a she shed.

If it is a shed where people need not live in, it may work.