The reasoning seems clearer and clearer, the Mail on Sunday has a good article and from a number of other sources it seems:
Royal Lodge needs two teams to secure it, now that Andrew doesn't get official security the King would have to pick up that bill, hence why it would be better if Andrew left
Royal Lodge needs a number of costly repairs now, twenty odd years after Andrew had to do the last lot as part of the lease agreement. How he would afford to do them now is questionable. (I'm not really convinced of this but it is being said alot)
Frogmore Cottage is both in a better state of repair and inside the main Windsor Castle security cordon. If Andrew were to move in it would save on repair bills, save on security bills for the King, and save the constant photos of Andrew driving about Windsor all the time
The MoS suggests H&M may be offered Andrew's old apartment in Buckingham Palace for when they visit - a perfectly secure residence which wouldn't need any extra caring for while they are away, provides them a UK base but also means a perfectly usable large house isn't sitting empty all year just for a visit for a day or two.
The suggestion is Eugenie (or Beatrice) may get Adelaide cottage after the Wales' move to Royal Lodge - after any repair and maintenance is carried out. A good way to lure Andrew into agreeing maybe
The MoS suggests
Andrew moving out of Royal Lodge was on the table before the late Queen died. If he moves out now he may get up to £1.5million back in light of the renovations he paid for.
https://www.dailymail.co.uk/news/ar...-losers-great-Royal-property-merry-round.html
https://www.dailymail.co.uk/news/ar...han-Buckingham-Palace-apartment-visit-UK.html