I'm on the verge of getting a trials bike too, well, maybe.
Any hoo, all you need is some rocks or a couple of logs, at a push an old car & your away. I want one to develop my balance, throttle control, bike control, fitness & technical skills without having to find a dedicated trail area, I can do it in the garden.
On trails they are not fast, you have to stand all the time too, which can get tiring but, they will go anywhere, literally.
When bigger bikes are struggling, the riders exhausted, you can just pootle around them & carry on your way riding an inch perfect line. Great fun & not intimidating.