The boilers have input of 5,500,000 Btu each. Tell me how many acres of
solar I'll need to convert 350 to 450 gallons of water per hour (at 60
degrees) to steam at 100 psi, especially running at night.

I don't know and neither do you. What I'm saying is that if I had
no choice but to spend that much money on heating just one thing
I would at the very least, get a quote instead of complaining about
it.
Lou