A new Abbey (on an obviously medieval footprint) is being built in Orange County, after St Michael's Abbey raised $120M for new construction in 2018.
https://stmichaelsabbey.com/the-new-abbey/
In other news, north of Los Angeles, a very small "great books" college, Thomas Aquinas College, is doing well and has opened a Massachusetts campus.
https://thomasaquinas.edu/
Also north of Los Angeles, see the Benedictine monastery, St Andrew's Abbey.
https://www.saintandrewsabbey.com/