My question is if she doesn't pay in 5 days, could I file a forcible entry detainer at the court ( We are in Macoupin County Illinois)?

I will assume somewhere in the lease it states that the tenant is responsible for a basic maintenance and upkeep of the property.

Squatters can now be locked out of a property and their possessions removed, but a landlord CANNOT physically remove the squatters themselves.The local police are supposed to enforce these laws and assist landlords in removing squatters.The reality is that when you call the Detroit Police to remove squatters:1) The police often don’t know/care about squatter laws and state you must take the squatters to court to evict them.

One if you do not register your company as a foreign company you usually cannot file an answer in court if you are sued. 

So even if you pick a state with stronger protections like WY or NV, the cause of action arose in the state where the tenant fell, so likely that the court where the accident happened would have jurisdiction.

The rental had ratty furniture, a record player prominently featured in the marketing but it had no speakers, missing basics items in the kitchen, lots of drunks in the concrete hallways that reverberated right into the bedroom at 2am, a strong odor of urine outside, and more.We have super hosts in this forum that have hundreds of 5-star reviews and are masters of the craft, but I look at their rentals and see they don't have any artwork on the walls, decor is basic, they do nothing to make the guest feel welcome, etc. 

Hey good folks of BP. I come to you hat-in-hand, looking for the collective expertise I've come to enjoy here. I work for a portfolio lender as their point person for construction loans, and now I'm trying to grow the...

Give it time, this is getting shredded in court as we speak.

Section 8 can be a profitable and reliable resource but it is 'their ball, their court' so know the rules first.

Thoughtful extras, such as welcome baskets or well-stocked kitchens with basic spices, can make a stay memorable.