Glazing in walls, enclosures or fences containing or facing hot tubs, spas, whirlpools, saunas, steam rooms, bathtubs, showers and indoor or outdoor swimming pools where the bottom exposed edge of the glazing is less than 60 inches (1524 mm) measured vertically above any standing or walking surface shall be considered to be a hazardous location.

I always use glass enclosures for showers and install doors on tub/shower combos.

One city near me is checking all garage enclosures, giving nice notice to get them permitted, which they may or may not grant, and if you don't get it properly permitted by December 31, says they will start fining people. 

So, if emergencies are the use-case concern, that is one option but also portable power stations which can be used at home, camping, tailgating, etc.

I was quoting pool prices for my clients several years ago at approximately $40K (basic package 12'X24' including screen enclosure and paver deck) and then they doubled and more after COVID.

I think this would make sense in the long run for the rental property as it will extend the life of everything it touches like the Sink, faucets, showers, water heater, dishwasher, and Clothes washer while also providing clean drinking water in addition to the reverse osmosis drinking water system I already have installed.The main problem with this hardness level is that we get a major deposit buildup on all of these items, which will eventually clog up the faucets for tenants and lead to rusty shower enclosures that take forever to clean.In addition to this, it looks like we could likely have the salt added every couple of months by the property managers in addition to that it would allow for a quick inspection from them, and then also we would instead bill the cost of the service onto the ledger for the tenants.For reference, it does not look like the landlords in the area have water softeners.Thank you everyone for your input ahead of time.

(optional)Kitchen Remodel (2020): Updated countertops, cabinets, and installed new stainless steel appliances.Bathroom Renovation (2019): Added new tiles, modern fixtures, and a glass shower enclosure in the master bathroom.Finished Basement (2018): Added 600 sq. ft. of finished space, including a family room and home office.New Roof (2021): Replaced the entire roof with new shingles and added improved insulation.Landscaping (2022): Redesigned front and backyard with new plants, sod, and an outdoor seating area.Energy-Efficient Windows (2020): Installed energy-saving windows throughout the home.

@Marcus Auerbach,  That is great advise and I am for sure am going back to wet signatures and tailgate signings after we have walked the property. 

The extra $43’000 will go into transport of the equipment as well as building an enclosure for it.

Enclosure: It must be its own separate, enclosed space with a door.