If you do not know how to control money well, adding more to your bank account will only create new problems.

You would have to create an HOA to manage the common area and keep control of that or create a self-managing HOA for the four owners to manage together.

Dave mentioned control in the TIC but alot of times that is an illusion.

Could also rent it out, controlled by an agreed upon third party that distributes equal pay to each party, and hopefully could also pay the mortgage out of rental proceeds so neither of you are on the hook.

They want to have tight control of which team is introduced to work with and do not allow sharing of info among members.

Finally, confirm if there are any existing service contracts (for landscaping, pest control, etc.) that may need to be transferred or canceled.

After a third infraction, you terminate their lease and move them out.Take control, or they will control you.

But I draw the line when there is risk of damage to the property, annoyance to the neighbors, health concerns, pests, etc.

Gov. mandates, laws, regulations, these are tools to control WHAT the product/service is, think safety focused. mandating no lead in toys, or fall-arrest gear for roofers, things like that, THAT is where it works. 

Furthermore, you should explore checkbook control versus having the custodian make all the investments.