Incredible growth, would love any resources you can share! 

It was fully renovated when I bought it.I added value by adding income-producing rooms.What was the outcome?

There are likely at least subtle differences between those proposals.In terms of good and bad experiences, you won't find an insurance company that doesn't produce happy and unhappy customers.  

This is incredibly reassuring to hear.

I imagine a lot split would also significantly increase cost of utilities as now I would have 3 hookups in that scenario.I am also concerned what would happen to that sweet 3.25% 30 year fixed mortgage I have, which I don't want to create any risk over in the slightest.Any advice on how to frame my counter arguments would be incredibly appreciated.

Hans - trying to find a perfect BRRRR in B class that cashflows well as an LTR right now is incredibly difficult with interest rates.

Which markets (Cities, States, Counties) are producing the highest cash flow while keeping purchase prices under 100K?

Ive done A/B testing to see if going through my mortgage broker, or going directly to the bank would produce a better result.

The latter two are just a little erratic to me, meaning they produce projections further away (above or below) from what I see in my clients' own vacation rentals.Not sure I can give you a great breakdown.

This is incredibly common in Philadelphia's market if you don't invest in the correct neighborhoods.