We have a guy who does bouncey houses as a side business and he stores all of his equipment in the garage.

I would also consider dropping the price just a bit but your agent would be best equip to consult you on this.

All the equipment and knowledge are there to do those extraction and quality control.

I guestimate 15 years for builder grade split DX equipment. 

Adelphia Pets.com Bear Stearns Beatrice Food ProductsDigital Equipment Corp. - 3rd largest computer company in the worldKodak - largest producer of filmCircuit CityBlock BlusterTower RecordsPolaroidand on and on and on . . .

2) Will he be running power equipment?  

@Brett GoldsmithMy friend owns security companys in Las Vegas, ADT is known by most people great brand, just do some negotiating on the monthly fee and the equipment should be free, very competitive market.

My understanding it's effectively a loan on the equipment for a specified period of time. 

.**)There are 4 property tax classes in NYC as below:Class 1: one (1)  to three (3) residential unit propertiesClass 2: Three (3) or more residential unit property including cooperatives and condominiumsClass 3: Utility Company Equipment and Special Franchise propertyClass 4: All other real propertyTable below is the tax rates for each class for 2017 fiscal year.I believe that this rate is changed every year, and I confirmed that the tax rate for class 1 for 2018 is 20.3850%. 

Hope you are dead on and you saved a ton of $$....But let us know in 6-18 months......I've seen too many " the pro wanted $xxx dollars and I got a handyman/guy off Craigslist to do it for 1/4 of that price", only to have that job/repair/equipment fall apart in a few months and cost double to fix it compared to having it done right the first timeIf it all work out, fantastic....but sometimes you really do get what you pay for.....