My office manager tracks them on a spread sheet but personally I don't think that is necessary if you have good key box inventory.

Just not a big fan of the ups and downs personally 

I personally like the BRRRR strategy - it's not easy to pull off but it's simple and it works in theory. 

Personally I am thinking 1c.

I have purchased 3 STRs personally in the last 18 months and have closed on at least 25 for clients in the past 12 months.  

I'm looking to buy houses off market for personal investments.

This strategy has worked well for me personally. 

Just keep in mind that there are further steps you'll want to keep to minimize the possibility that your entity is ignored for this kind of personal liability (say, if you were the person who didn't properly clear snow, or if your finances and the LLC's are comingled).And I agree with @Chris Seveney, insurance may provide adequate protection based on what's available to you.

I know there's a way to leverage this into some healthy growth. 

It's led to incredibly high occupancy rate in the off-season, but I'd rather have a slightly lower occupancy rate in order to reduce wear and tear and leave some weekends open for personal use.I'm at a loss on what to do about this.