In my opinion, your offer price & value add should be based on the ROI target or hurdle rate you've established for your business. 

The City of Branson does require a business license to operate an STR if you self manage.

Unfortunately you will need to bring on a business partner for this deal.

I read a lot of books on real estate and business but the magic happened once I stopped reading and started taking action. 

I would like to add to that I've just been busy with other stuff.I keep track of income / expenses for my 3 income producing properties in a spreadsheet.I also just bought a new home last year and still trying to sell the old home.

That’s like asking how much could you make per car if you’re running a Huber business?

Hey there, do you have any recommendations for an agent in the Seattle area to talk through the potential properties to operate a family entertainment style of business?  

First, get as organized as possible and present yourself as a business, even if it's just you running a business.

I do however know a few people that have scaled up STR businesses here, like one friend/client who has 12 and there are some bigger players for sure.

Those are ownership stakes in the business that owns the property, not ownership in the property itself.