HUgs. Some good advice seeking info in previous answers , it may come down to medical costs, like if your eligable for medicare or not and public accomodtion in a public hospital or care accomodtion when you may probably need post surgery recovery , chemo, radiation close to healthcare. Its great you have already had an offer of someone to stay with. Sadly it can get very expensive and work needs have to be very flexible and often reduced , important to make finacial decisions at the start of it all. Health has to come first. Another very good work planing service is https://www.liveworkcancer.com/
They may be able to offer some career advice and you can get a free 45 min video call to chat with someone about work planing.
Hospitals usually have a social worker, that may be able to let you know how things work for rural patients.
Its always hard to predict, i do know some people who able to work through with just time off here and there, but there are an awful lot of appointments, blood tests, scans, treatment sessions. Its a marathon, focus on the long term goal to get rid of the cancer. It's a huge shake up , big change of plans as we face our mortality. It is hard, but you can get through it. Meditation every day really helps with the anxiety. That's science not woo woo.
Pink wishes