Will there be a formal partnership agreement with a legal structure and a legal framework that you can all rely on to resolve disputes?

Under Wisconsin’s adverse possession doctrine, there are three scenarios in which a person or entity may take title to the real property owned by another person or entity: (1) by continuously occupying the property for 20 years and claiming the property as his or her own property despite having no instrument actually conveying the property to the adverse possessor;³ (2) by continuously occupying the property for 10 years under “color of title” (usually occurring when a written instrument or court judgment mistakenly conveys property to the adverse possessor);⁴ or (3) by continuously occupying the property for 7 years under color of title and payment all taxes and assessments associated with real property being paid by the adverse possessor during the 7 year period.⁵ Under any of the three methods of adversely possessing a record title holder’s property, the adverse possessor’s occupation of the property must be hostile, open and notorious, exclusive and continuous for the statutory period.⁶ Hostility does not have to mean deliberate or with unfriendly animus on the part of the adverse possessor, but simply means that due to the adverse possessor’s claims and use of the disputed property, the true owner is unable to assume possession of the property (i.e., that the adverse possessor is claiming title to the property).⁷ Further, open and notorious simply requires that the adverse possessor present to the general public that it is the owner of the property.

So you're only disputing the flooring?

The vast majority of lawsuits against Landlords are for wrongful eviction, security deposit disputes, and Fair Housing Violations.

Regarding the title docs...usually you can do a resolution agreement and have all LLC members sign it, which will allow you to be the only signer at closing.

The vast majority of lawsuits against Landlords are for wrongful eviction, security deposit disputes, and Fair Housing Violations.

Most lawsuits against Landlords are security deposit disputes.

Partnerships where you try 50/50 splits can get extremely complex and lead to disputes.

It is my understanding that it does not matter what - if anything - your lease says about conflict resolution between yourself and the tenant.

I suspect when you look back you will find you did the same.If you got an inspection on the property you may want to reach out to the inspector if anything was obvious but I don't think you will get any help there.You could also try to get an attorney to send a certified letter saying you are considering legal action if you can't come to a resolution but any additional fees may not be worth it.If I were in your shoes I would remedy the safety issues (electrical, plumbing, etc) with licensed contractors making them pull permits, consider this a lesson learned, and move on.