See my mom and I own the house I'm in, so we live together too even though I'm older.... so I've totally already gone over different ways to get her out. With her it's a me paying for her to have a night out with her friends at a gambling boat and staying at the hotel there. Then me scheduling a text-emergency-service (apparently there's some option here--have to verify), with notes on the doors of "I have 3 cats and 1 dog, please do not let them out, I"m in ____, you'll need a stretcher for a body pickup --*my name* with my driver's license laid out so they can ID me" with me also setting an alarm to "wake me" before the text goes out "just in case".
Not that I've thought of it lol