A Demand Letter, then assuming that doesn’t work, a law suit. 

It was during Obama term, i recall it vividly as i was playing with the internt in my Hong Kong Mansion Hotel suite.     

@Rafael Castellanos despite your house being zoned for SFH, it is not illegal to turn your garage into a master suite with a bathroom and “wet bar” that happens to have a refrigerator and a “side entrance.”

I'd look to see if you can get some single family houses (perhaps some with suites or accessory dwellings that can be rented separately) or a duplex. 

Being that Illinois is a Judicial process State when it comes to foreclosures, meaning it has to go through the court system, the lender has to file a suite against you and there is a timeline of when responses are due and even a redemption period that extends up to 7 months after being served where you can retain the property if the note is paid in full including costs etc. 

All you need in your guest suite is a desk to add the amenity of 'Dedicated Workspace' and you can make you listing more appealing to people looking for an extended stay but still need to work. 

I've set out, launched a company and built a team best suited to address these issues.

I am looking at 4 properties and 8 doors. 2 Duplex and 2 single family with mother in laws suite.

The other option is to search for SFHs with mother-in-law suites or ADUs.

As per your state law, the contractor would have a set time, usually 90 days to one year, to actually file suit to enforce the lien, or it will expire.