That describes my family. We’ve done Airbnb and VRBO, but now pretty much stick to hotels. You know what you’re getting, price is competitive, to bdint have to wash your own bedding, and a lot of hotel workers are unionized. That’s all in addition to the awareness that every Airbnb house could be a home for someone who needs it. I won’t be sad if the Airbnb model folds and helps the housing market regain a bit of sanity
Can always rent an electric 3/4" snake from a box store for under $50 I think. Make sure you’re close to the feed point or you’ll be wrestling with sewage-soaked coil. I’d go from the floor drain that is backing up if you don’t have a toilet you can pull right next to it. Goal is to feed it to the sewer main. Scoping is the right answer, but a powered snake rental and an hour of dirty work has a chance of giving you some breathing room.