When Microwaves first came out they were huge but with a tiny cooking area and they were not affordable, and were mostly in business kitchens and a few restaurants. I would love a freeze dryer but the cheapest I have seen is $1600 and they only have 4 small trays.
Its probably more affordable to just buy prepackaged foods than to spend the money and considerable time and effort on a freeze dryer.
Check out Technology Connection’s in depth video on the subject: https://m.youtube.com/watch?v=Namf-Ddo_Xo