I have a few small Fir Trees growing and a lot of small Pines. I hope to have a forest around my house someday.
It used to be you bought land, built a house and planted trees. Your grandkids might someday live in that house and eat fruit from those trees. Now few can count on jobs keeping them in one area so we lose our plantings.
My small potted collection is only a bit portable but I like it. Are you collecting the rainwater you do get?