@Henry Lazerow late to the party haha, but this is the kind of success story I come here for.

He's exceptional at proactively creating terms that mitigate our risk and protect our investors AND getting all parties to come to the table, work through challenges, and get the deal done (it's no surprise that not all deals are smooth haha!) 

I'm not an attorney and this is just my opinion.I suggest you talk with a good WI real property attorney.I suspect you'll want to make sure something codifying your equitable interest is recorded in the public records of the county where the property is located otherwise a third party who lends money to or obtains a judgment against the Vendor my have priority over your interest since they didn't have constructive notice of it.I don't know much about WI law but it may be the seller wants a land contract because if you default he may just need to record a notice of the breach to clear your interest from the record rather than having to bring a foreclosure action. 

You really shouldn't need 3rd party software for one STR.

Hi Y'all:We're in the stages of possibly transitioning away from our financial advisor at a large institution to a third party custodian and hiring a true Fiduciary.

Depending on the number of partners you are bringing on and the value they bring to the partnership, you will split it in a way that is fair to all parties.

Like, 1.5x the number of interested parties from 2 years ago. 

To clarify, I'd be an absentee owner and would utilize 3rd party management but really need to be cautious with all decisions.I'd appreciate any thoughts or suggestions.

Get bids from multiple parties, not just one.

Clean and private is the only part I would spend money on.