With the King moving out of Buckingham Palace, why doesn't Andy Burnham decant Parliament there while all the repairs are done?

MPs and Lords were supposed to move out of Westminster ages ago because it is falling apart, when it's not trying to set itself on fire or fall into the Thames.

Various other options have been suggested but what about Buckingham Palace, now Charlie wants to move out anyway?

It's basically in the same location, it's obviously very fancy, and who doesn't want Burnham to be ruling in the opulence he deserves?!