I think I know the building and there is not much to consider with this type of use: if chemicals were used your lender might require a phase one envirmonmentals study, but I don't think that's the case here.Issue number 2 is that it can take a while to find a new commercial tenant, so while tenants typically stay a very long time, if you have a turn over you may have to spend some money on preparing the space for a different use and it could be some time before you have a new business.

The plumber quoted $900 to jet it out, or $3500 to dig up and replace the pipe.I see there are chemical root treatment options for this that is much cheaper.  

Chemical treatments can mask smells, for awhile.Fire restoration is a specialty and I'll bet the inspectors will be very tough on a new guy breaking into the business.

It's nasty, hot/cold work in confined spaces, heights, noise, chemical pollution, etc. 

He's a mad scientist with water temp, soak time, the chemicals etc.

The individual that did it said they typically last 2-10 years (super wide estimated range) depending on the chemicals that come in contact with the reglazed surface and a few other factors. 

@Paul Sandhu some pallets have insect treatment that release toxic chemicals when burned and they are stamped MB, so I wouldn't stand too close to the fire if they are burning that type of pallet.

You really have 2 things to consider the Fantasy of it--letting you close easier, (the potential renter believes they will use this item)and the reality of it no one using the pool except one apartment, yet pool overhead is expensive, deprecation on equipment, taxes, chemicals, upgrades to equipment, resurfacing, emptying trash, stolen deck chairs, etc...Same with a workout center, treadmills and big balls, and mats or treadmills plus workout machines, and when the TV's get stolen, etc..or nothing...What do potential renters for your specific place....think they want, and really do want....and then there is the cost....If you have dogs a dog walk is a good thing as the dog waste should be less all over the lawn.Just my 2 cents..

Hey Kyle,I bought a SFR in Kansas City and worked with Sean Huss at Chemical Bank.

Heck, wear a face shield and long garments that you don't care if they get destroyed (We once had a guy get a pretty good chemical burn through his denim pants doing this.