Dehydrated Food Hiking Freeze Dried Dehydrated Food?

Freeze dried dehydrated food? - dehydrated food hiking

Is it possible to freeze dry food / fruit freeze at home without spending $ 100,000 on a machine to dry? Frozen fruit, such as water, gas without the use of water first? My children love freeze dried fruits, but the cost of buying them is unreal, I thought (if possible), it would be cheaper at home. Someone knows how can we freeze dried foods at home.

Thank you.