The pipes slowly corrode, you have buildup on the inside which restricts flow to the point where you don't have enough pressure at the faucets, they develop pin holes, shut off valves start leaking or seize up, so when you have to shut off water in an emergency, you can't and you are causing more damage.

So the plumber does a few faucets and toilet replacements that I could easily handle so that when something busts loose on a weekend I can get him out there.

On utilities the plumber thought I was a little strange for asking to add a water meter to a well while he was doing some work but it has helped me identify if someone has a drippy faucet or running toilet more than once.

Proactive maintenance keeps those costs at bay.It Protects and Increases Your Property Value: Think of a leaky faucet.

Air conditioners are harder because some parts may have been replaced, but using the manufacture date is usually a good starting point.Calculate the remaining useful life by subtracting years in service from the useful life:Calculate monthly provisions as follows:AC compressor: $2,500 ÷ 16 years ÷ 12 months ≈ $14/monthWater heater: $1,500 ÷ 3 years ÷ 12 months ≈ $42/monthTotal monthly provision: about $56You may have more high cost items, like roof replacement.Base MaintenanceIn addition to major components, you should plan for routine repairs—things like dripping faucets, slow drains, or minor fixes.Across the properties we manage, the five-year average for these base-level repairs is about $400 per year.

From what I understand to do it right they had to completely replace the $100 set of knobs/faucet/etc. but instead what they did was take an old part of a different (but same model) system and stuck it in there leading it to leaking again.

I had the back splash re-done in the kitchen, light replaced in kitchen, epoxy the countertop, painted the entire inside,  replaced the doors/hinges/handles, replaced the carpets to the stairs/2 bedrooms, replaced all ceiling lights and ceiling fan, replaced the water heater (old one was way out of date, also had my brother help me with that since he is in hvac), kitchen sink/faucet, bathroom mirrors, resurfaced the bath tub.

That leaky faucet?

If you can't isolate each individual unit then you are going to have to start with the obvious and usual culprits, which would be toilet, dripping/leaking faucet, leaking outside hose bib.

LVP options around $2-$4 per square foot.Sink & Faucet ($450):Stainless steel, single-bowl sink.