The addition is the building in bottom right, which will be a larger 1st team gym.
More details can be found here...
https://planning.newforest.gov.uk/online-applications/applicationDetails.do?activeTab=documents&keyVal=_NEWFO_DCAPR_215561
How is that remotely relevant?
I don't have a choice over what symbols are on the money of the country I live in. If I want to use physical cash then that is my only option. I do however have the option to not sing the national anthem if I don't agree with its two key focuses.
Bale was sold by Spurs in 2013, when Saints had already finished their first season back in the Premier League so missing out on a sell on % had no impact on the financial problems we had leading upto administration in 2009.
The Mane fee was one rising to £38m, which at the time was alot. Had he been sold a year or two later it would have been alot more as player values increased rapidly from that point.
We probably aren't going to sell them when they are the finished article. van Dijk wasn't the finished article when we sold him for a world record £75m. Potential still warrants a big price.