I don't see them as mutually exclusive; I don't think a particular distribution of real property is synonymous with political liberty. I see no reason you can't still have markets, competition, private wealth to some degree, but I think ownership of industrial production should be distributed far more evenly across its workforce and even its customers to some degree. AI could significantly enhance democracy by making it practical to do a lot of things at the local level that would otherwise be enormously administratively and logistically expensive.
No special reason for 25 hrs/week, just a ballpark figure of about how much work should be necessary to support yourself to a median level of economic security. I like the number 5 so 25 seems like a nicer number than 24.