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.

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

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.

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. 

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. 

Did you buy the homes with the intention of going that route or did you own them already and pivot to capitalize on the opportunity for the increased revenue?

As an aside, it's not difficult to manage your own property so if this doesn't work for you, you could always pivot.

Plus, working on properties close to home will give you the insights you need for when you pivot to rentals.You’re in the perfect place for advice, tips, and a community that’s got your back.

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

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