Use LVP. this right here.

What made you interested in investing in this type of deal?

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.

Devin,Thank you so much for the info, I will look into this.

A cost segregation study was performed on this residential condo in Herndon, VA purchased in 2017 with a depreciable cost basis of $151,518.

This is a landing page I came across in the Boston, MA market.

I know this can be expensive.  

The purpose of a landing page is to quickly and effectively convince a person who is genuinely considering selling their house at a discount to leave their contact details so your acquisition agent can reach out to them.Anything that hinders this process will ultimately LOSE you money.

Quote from @David Nathanson: This is a great question. 

If you don’t mind living with other people, this is the easiest way to get into REI with little capital from you. 12 months after living in the SFH or multi unit, you can then look for another property and rinse and repeat.