If you are not planning on letting them get big, it really does not take much space.
1st large batch I did was with Acai palms, I bought a 100 seeds, which I planted all in a seed bed, the healthiest ones, I transplanted to 1 gallon pots, I sold some, gave some away, and did trades with the others. I basically introduced this palm here, as the local botanical garden, did not have them I donated some.
2nd batch, was Moringa, I planted 100 in poly bags, was going to sell them at an event, but that even got cancelled, so I have all these moringa trees getting leggy, I gave some away, let some die off, and planted one in my front yard, which is not about 7ft tall. of course I have consumed the leaves from some of the others, good thing about moringa, you do not have to wait for it to mature, to harvest from them.
I will start stuff from seed , and most of the time just give them away as gifts. next seeds, will be Sugar Apple, and Canistel, which I will give to a raw food eater that has a few acres of land, and was interested.