I reside in Massachusetts and have recently taken on the role of landlord for my parents' house as they have aged.

I also know that they "didn't know about the sale ahead of time", so I have to imagine that played a role in the lien. 

Immigration plays a big role in this, so it would be hard to predict unless you know what happens with population growth.I think it's still a basic human need, and one that the government can not provide at a reasonable cost.

There is a lengthy discussion comparing and contrasting the "broker" and "finder" parties and their role in the transaction in the court case described here: http://law.justia.com/cases/new-york/other-courts/2010/2010-20104.htmlWhile I realize this does not apply directly to the topic at hand (Wisconsin), I and other BP members in other states should find it very informative and educational.

For the purpose of this exercise lets focus on the other 99% who invest in SFR homes which is for the highest yield outcomes.  

How have you gotten aligned with your co-buyers in the past (any exercises, tools, resources, processes, etc you've used) and how might you do things going forward?

I would get clear on not only roles, but expectations.

Quote from @Rose Jones: I would consider using a realtor if the property is 20,000 or more and yours meets that benchmark.I have done much bigger deals without a realtor (19k-3m) in various roles. 

He has also played a key role in facilitating communication between the new tenants and myself, ensuring a smooth coordination of arrival times and addressing any specific needs they may have.

When the next month roles around you do a convenience check from card 1 to your account, write a check paying off card 2.