It's super easy to dehydrate ground beef, or even finely shredded meat including turkey, chicken, venison or whatever. You then pick up a gravy packet, instant potatoes and some dehydrated mixed vegetables and experiment with getting the consistency and taste right (too much gravy = way too salty).
It takes longer to rehydrate than freeze dried, but it also tastes better, has no mystery ingredients and is a fraction of the cost.
I look at "freezer bag" meal recipes from the hiking crowd, they have done all the work.