Can't an individual buy it and then sell it to a Traditionalist group? You have to be able to outsmart the Modernists.
I think that is how + Williamson and 2 or 3 others bought the school in Lauzon Quebec, Canada, c. '87.
They got enough for a downpayment under another name, and then the local bishop wasn't happy when it was transferred to FSSPX. I believe that is how they worked it.. Same thing in Vernon B.C. Fr. Greuter was in that area, and they fooled the local bishop.
https://oldheritagechurches.wordpress.com/tag/vernon/"
...The roots of the Vernon congregation go back to around 1984, with its founder Father Paul Greuter saying the Old Latin mass in a basement chapel in Kamloops starting in 1973 and then later in other communities such as Barrière, Oliver, and Vernon as and when the demand arose.
In 1986, the former Ukrainian Catholic Church in Vernon was put up for sale and a group traditionalist parishioners who were sympathetic to Father Greuter managed to raise the funds to acquire the building. Our Lady Queen of Peace Church held its first high mass on May 18th, 1986..." I drove their altar from MN USA. (Dorothy?) to Vernon...June 2, snowing at the mountain Pass...The good 'ole days.
****I forgot to post the Jaidhoff link, Castle. sorry;
https://apostolat.fsspx.de/unsere-hauser/schloss-jaidhof-at/