I appreciate you thoroughness in the matter but we will handle everything as far as that is concerned and give your buyer a clean title at closing."

Your finish work and cleaning follows these items.

Option 3 may sound tempting to you, but before considering that route I would interview prospective property managers and house-cleaning services in the area you are considering.

I've seen insurance premiums for flood go up to 5-6k on a regular single family home depending on the area. 

After all PITI, utility, and services (lawncare and cleaning) costs I have $7,225.I set aside 25% of this for my maintenance fund.The remainder funds my lifestyle, wife has a Tesla, and quarterly vacations as well as business growth.In 2023 I am tracking to build 4 duplex units designed as room rentals funded in part from a recent land sale.

Less cleaning but maybe more maintenance.

Quote from @Marc Shin: For my STR, should I be using waterproof LVP or regular tiles for the bathroom floors?   

The main issue with rental basement is water if it has water issue usually it is a simple fix .Clean gutters ,discharge gutter  water away 10" away from foundation, make sure you foundation soil is slopped away from it .If you need to buy soil get a clay mix .Cut back any tree too close to the foundation look at the drip line that's how far the limbs are out from the tree .If all that is done still has water buy a sump pump  carry the water to day light away from foundation 10" to 15" .

Sometimes large employers will rent furnished apartments for their employees coming to town on a regular basis.Also, if you believe strongly in the appreciation of the house, how bad would the negative cash flow be if you did long term rental? 

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.