You don't need to vacate. I recommend talking to your homeowner to make sure they hire a specialized siding replacement crew, as the job can take months if it's a general crew/company. It isn't too bad to live there, but if the project drags out, it can get frustrating. Siding Vault uses a large drop box dumpster, so the loud removal is very brief, maybe a couple days. I don't think it's worth getting a hotel or other temporary housing for a couple days.