Wow, that’s a tough call, Best Wishes to you.
we moved premises 14 yrs ago, (same village, same committee, same staff) the premises wasn’t completely set up, mostly an empty shell, I just explained what areas would be where and how thise areas would support development, I did have to have the suitable persons interview again even though I’d been the manager for 20+ years.
I’d email on the enquiries@Ofsted email (for all changes now) and explain the situation/time line.
could you put something out to the community explaining the situation, you might find a business happy to do a charitable act for a bit of PR and help with the actual moving of equipment (or parents who would give up a little time, especially if they no there is a chance it won’t be ready to open Jan’25).