How do I convince a girl that I want to come to her house for some sexy fun?

I will be going back to Toronto on Sept 21. I am messaging Toronto girls right now. AirBnb requires you to book for at least 3 nights so AirBnb is out the window. I want to save as much money as possible. I do not want to pay motels or hotels. I want to bang the girl in her house.I can commute to her house. I cannot bang the girl at my house due to the fact I will live with my mom to save money.

1. How do I convince a girl that I want to come to her house for some sexy fun? What kind of lie can I tell her?
2. How to handle flakiness of women when you are trying to bang the girl at your house? She can change her mind all of sudden. In your guide, you have two dates at your house in case one of them flakes. How would this change if you are trying to bang the girl at the house? Do I have to do two dates at two different locations (so I will have to use Uber or bus)?
   Thanks!