Start a housing coop and community land trust to keep housing in the hands of people that need it. Rapid public transport for the housing coop for work, groceries, etc. Buy the old tracks and turn them into intercity people carries.
Buy the land from friends and family to pay off their debts and give it to the community land trust.
Start a community coop grocery store, pharmacy, clinic, etc.
Start a community electric coop focused on being a microgrid first and connection the national grid second.
Start a community fiber and wireless ISP coop, and fighting tool and nail to end the current ISPs state monpoly on shitty expensive service.
Try and create guerenteed minimums for both so no one has to disconnect because the money istoo tight.
Yeah I'd do something like this as well after I spent the first few years fulfilling my hedonistic desires (travel, music festivals, language tutors, personal trainers and the fanciest IV supplements etc. etc.)
I'd also bankroll a cooperative owned software platform that could compete with a major tech firm. So maybe like create a co-op owned Lemmy instance (or like social.coop) and promote the idea of online public good spaces.