Should I stain these doors and hardwood floors a dark expresso color, or lighten them, or just leave them alone?

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.

Hello, I have a two-unit SFH (first floor unit & second floor unit which share a main entrance but have separate private entrances once inside the house), located in California (I know...).

@Sol BergrenIs this new flooring or flooring thats been through some usage?

Aloha,Poorly maintained tanks, and especially tanks in an environment that creates excessive condensation on the exterior of the tank, often drip onto the floor, damaging floorcoverings and underlying typical subfloors or hardwood flooring.

Another great example is flooring.

I'd still do a land trust again in the future, but I'd be sure the ownership structure was nice and clean without mixed entities and SDIRAs in the mix. 

With four plex you have to pay utilities for the hallway and common areas, also maintain and clean the common areas, because the tenants won''t.

Some are basically renting out bed space and require tenants to sign an agreement to stay clean, and be tested upon request, with failing the test potentially leading to immediate eviction.

America needs your management style - take responsibility, fess up, come clean and do the right thing.