You will spend well in excess of that on average over 1 year, and definitely over a 10 year period with equipment repairs/replacement or having to remodel your pool interior which will cost approx $10,000 on average. 

Zoning wont allow a legal rental for outside storage , and I dont want to draw attention or traffic since my shop is right next door and I am borderline legal , and dont want people around my equipment .

Tenant agrees not to use carpet cleaning machines that add water to the carpet, as most consumer equipment can not adequately remove water that goes into the carpet and more damage is likely to result.

If you think someone out there on a stock market will pay you for it, you can buy some mining equipment and agree to split the profits of any find with other miners out there.. the wikipedia link above is pretty good if you're interested.I'm not sure about the "falsely adjusted market."

He showed me his equipment.

But you know, some places like my county are taxing personal property in rental property from a business equipment angle, so breaking it out makes sence.

I'd first find out who filled it and how it was filled, pool debris, concrete isn't a problem, but if the pool filter and pump equipment was tossed in the hole there could be a void.

The air conditioner manufacturers are going the way of the automotive company's so you have to use their parts on newer equipment coming out.

You can do investing many ways.I personally like apartments and NNN properties and it's what I specialize in.One that I didn't see mentioned is investing in businesses and or flipping businesses.You can find an owner wanting to retire and you put 25% to 50% down and then finance the rest.You can also find someone who wanted to own a restaurant for example and buys a business a runs it in the ground.I see this often with people that have retirement savings and want to put the funds to work and do something.They think having a business all these people will come in or keep coming in based on what the previous owner is doing and it will be fund to run it.After running it in the ground they are ready to dump it cheap.You let them pay for the expensive buildout and all new equipment and then pick it up for next to nothing.You put systems into place and turn around and hold long term for cash flow or sell it off for a profit and do it again.These are my main 3 categories I focus on for myself and my clients.I also like raw or semi-developed commercial land that can be sold off for a big profit.

I explained I owned the house, was living in it, and all the lifts and other equipment was rented.