I go to a lender (whichever type you prefer or have access to) and find out how much I can get.

Investors often call this a cash-out refinance, but a closer look at the guidelines shows you cannot get more than you invested in cash or funds that were "seasoned for two months" as your money, you cannot use a value higher than the lower of the original purchase price or appraised value whichever is lower, and you must use the cash out LTVs which are 5% lower than purchase LTVs.  

I’m thinking my split on a 20% fee of owner’s STR rental income would be 75% + a finder’s fee for new clients of $1000 or 1% of first year’s 20% rental fee (whichever is greater) + 90% of the $1500 listing setup fee which covers all the work of creating the listing, coordinating the photography, on-boarding to channel management and dynamic pricing software + referral fees on rental properties that go to list.

Whichever asset class you are looking at, assuming it is a fairly major market, there will be multiple groups (both landlord/tenant reps for leasing and investment sales for buying/selling) that will know the property and the stories behind it.  

Contact which ever firm is the largest commercial real estate office in your area.  

I like Moonridge, it’s almost split right between Big Bear Lake and Big Bear City so you can go with whichever fits your criteria. 

The third unit can either stay within the LLC or be sold to me personally, whichever is more beneficial.

I would choose whichever one you can travel to easiest.I just bought my fourth in Pigeon Forge.

From what I have read (and I'm getting ready to buy a place to STR) these are the rules:Must be owner-occupied some portion of the year: According to the IRS, this is either 14 days a year or 10 percent of the number of days it’s rented out (whichever is larger)    (So if you rent it out for 180 days, you're expected to stay there at least 18 days.)Limited to one-unit dwellings, such as a house, apartment, or condo (as opposed to an entire apartment building)Borrower must have exclusive control over the propertyMust not be a rental property or timeshare arrangement: However, you can rent out the property for part of the year, as long as the rental income is not used for qualifying purposesCannot be subject to any agreements that give a management firm control over the occupancy of the property. 

I know you have had a myriad of disappointments throughout the entirety of this mess for these years, but I am sending good "juju" in the universe for you, and hopefully there is an end in sight for you.As another young lady who has offered to buy you a drink after this; when I am in LA this year, I will buy you one too, or you tell me your favorite restaurant/bar, and I'll make sure you get a drink on me - alcoholic or non-alcoholic; whichever is your preference ;-)