Wow....I'm impressed. First that your daughter is a hero traveling Covid19 nurse. Second that you found the perfect rv with a second rear bath with it's own entrance that's perfect for decontamination. Well done.
Build times vary and your dealer should be able to give you an estimated delivery time. Shortages of appliances, parts and materials have made delivery times longer and more unpredictable.
Then, as others have said, make certain that everything works and is fixed before you sign the final papers. Once you sign those papers, you are shuffled off to the repair/warranty department and people have had their rigs there for months trying to get things repaired. We insisted that things were done before we signed the final papers and the repairs were done within a day. Then we signed the papers.
Welcome to the forum.