The liquid nitrogen requirements in a dewar would be about 100W per person, which is within range of a human bike generator. https://cryonics.org/members/cryostats-for-cryogenic-storage/. There's also pumping the vacuum, it's within range as well. I edited my statement to say "bike per patient", I guess you could have interpreted it as "bike per facility". Alcor mentioned having them "just in case" but it was a while back when they had fewer members and I guess they took down most of their website. I think this is more to make a point, can't imagine anyone doing that realistically, maybe it makes their loved ones feel better. But if it makes a strawman easier, sure, you can interpret my statement as "people will live forever because bicycle" and say "you don't understand thermodynamics!!!". Checkmate.

Source: I am able to read, google and do basic math. Not sure where you read "expert" but that makes me qualified to make this statement, as would be many 6th graders. I'm also good at reflecting sarcasm, aaaah.

The website (google) says (reading) $100/yr, assuming electricity costs $12 cents/kwh and the conversion is efficient, that's 100 / 0.12 * 1000 / 365 / 24 = 100W (basic math). Evidence: uh, lmgtfy, eyeballs, pemdas?