Interested in attending a Mini in 2020? Minis are typically held on a weekend during April-July. Watch the Mini Christmas Expos forum to receive alerts (and emails) when planning and discussion begins.
Try finding a server PSU, there are some that are 1000w with just a 12V rail. Alot of modern server PSUs dont have 3.3v and 5v rails anymore. Ive got a couple that are pretty old now, but 60A 12V. Also, server PSUs are pretty darn reliable