The zero lot line houses are built around shared front yard space like this concept.

Any Chicagoland BP members out there willing to share their experiences with lintel replacement?

I'd be glad to help in any way I can and to share experiences.Best wishes!!

I'm hungry to learn and share my journey as a landlord and real-estate investor.

There are a ton of great people on this site who are willing to share.

@Mike Messersmith Thanks for sharing that blog post.  

Then please share that information.

Do you write your own lease agreements, or have any resources you would be willing to share.

My guess is that both properties would be used as collateral since they share the same deed and both you and your in-laws could have to qualify for the loan but this isn't my area of expertise. 

I asked what the difference was (sounds all the same to me), and they said that duplexes had two seporate addresses whereas a 2 unit multifamily shares the same address.