There was a case in another PA city where somebody built a second house in the back yard without a permit. 

Just curious... since you are now living in one of the best real estate markets in the world, why not invest in your backyard?

If you're close to a hospital or medical center, then you'll always have a pool of working professionals as possible tenants to choose from.

On my 5th home from my list, there was an SFH 3/2-Pool 1900 Sft property listed with Caldwell Banker.

Thank you for responding we focused on remolding the downstairs bathroom, painting the whole inside of the house, put vinyl flooring in the living room, kitchen and dining room and fixed the backyard by putting 1/4 concrete and the rest turf.

I think when people book a home next to Disney they want a pool so I ended up getting a 7bedroom SFH with a pool.

Don't bother leaving your backyard when you can do it in this market. 

Paint ext/int, paint cabinets and new countertops, new appliances, new floors throughout, sand and repaint a large deck, contingency set aside for pool, power wash roof/clean gutters, new front door/back door/leave slider, new lighting and plumbing fixtures throughout, as well as all handles, cabinet pulls and so on.. 

Does anyone have any experience running large or small mini storage out a back yard?

I had one suicide by gun but it was done in the back yard so not a big issue on clean up..