We could go with a Rheem 2-Stage Variable Speed 80% efficient furnace.

That is far more valuable than money in my stage. 

At what point am I responsible for paying, or paying part of, an excessive water bill? 

When we purchased the property we did account for water as part of our expenses but last month was excessive.

@David Gauger one challenge with a rent estimator like air dna is that their data is often based on bookings/vacancies that occurred months ago, and the market today is COMPLETELY different than it was several months ago.Specifically, there has been recent data showing that the STR market is completely over-saturated with supply, and most indicators show that we're in recession--which means that demand will likely decrease substantially (or is already decreasing)...it sounds like a perfect storm of excess supply and diminishing demand.

Everyone I've seen says "I buy houses" and they "buy" with an assignment contract, but my worst fear is if I start doing that and I still don't get a buyer, I'm going to be stuck with that house that's too expensive for me at my current stage of life.Are there clauses you can put in to wholesaling contracts that allow you an exit if you can't find a buyer? 

Look to stage 1, potentially even 2 properties, with those funds and maximize cash flow. 100% doable. 

At some point I'll slow down and settle down but at this stage in life I love chasing deals, flipping out of deals into bigger deals, and growing into more advanced investing strategies.

EVs are decades away from being practical, they need to figure out how to 1)  not rape the environment both during the building and recycling stages, 2) get the costs down and 3) provide a serious power supply for them that does not rely on fossil fuels.

Aloha,Develop a process for each stage of your operation (client/property acquisition, application, move in, tenant management, move out, rent prep, marketing), and stick to it!