House hacking, living in one unit and letting the proceeds from renting the other unit pay for my living expenses.

In rare cases it may be possible to have a court enforce the terms of the contract and order specific performance (sale of property).

@Steven Wetherill I would encourage you to proceed with caution but also understand that trying to time the market can leave on the sidelines indefinitely. 

if you do not have a Certificate of Occupancy in your City and try to collect rents from courts you will lose.

You 100% need to proceed to the obvious answer. 

In MI these do not show up on credit checks as they are not filed with courts so you can let her know it will not have any impact on her, you are only doing it in case she doesn't leave you are not having to wait an additional 30 days.  

Can someone share experiences how a court looks at Sub To agreements?

For example, going to landlord-tenant court without one seemingly unimportant document with a signature and date on it could cost you months of back rent.

I have no real expertise here though, although I have been a court mediator and am used to helping people lay out motivations, wants, needs.

The order is now null and void and hopefully landlords can proceed with orderly evictions.