Frogmore was slated for restoration by Soveriegn Fund property upkeep. It was bundled along with many other projects, such as Royal Lodge (7 million) and Buckingham Palace (350 million). The Sussexes paid extra to make it modern residence after Sovereign Fund made habitable.Who is going to pay for this? Frogmore payments added into the staggering amount of bills equals a huge amount of debt. Dad needs to save his money... JMO
Running costs on Prince Harry and Meghan's $14.7m mansion could reach $4.4million per year | Daily Mail Online
It was always scheduled to be restored, to let the property deteriorate any further is against the sovereign funds rules.