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New facilities will be 99–99.9% smaller than conventional vaccine facilities

They will be 95–99.7% cheaper than conventional vaccine facilities

You could use a single room in a conventional vaccine factory to make more vaccine doses of mRNA vaccines than the entire output of the rest of the factory

New vaccines can be made 1,000% faster than previous vaccines

There’s more, like the fact that you only need part of the facility to be a high-spec clean-room, and the rest can be built on more conventional lines.

For $20m, they say they can build a facility where, for $100m/year, they can turn out 1b doses/year, using a single 5L bioreactor."

https://coronavirus.medium.com/manufacturing-mrna-vaccines-is-surprisingly-straightforward-despite-what-bill-gates-thinks-222cffb686ee