Hmm I guess you can go either way. You might have a better time of it with soil if you're new to growing but do better with bubble cause of the benefits of hydro. It's not 'hard' to do hydro but it needs more attention and oddly the smaller the system the more attention it needs. You need to watch your water pH like a hawk. In a small rez it can get out of control fast. Also, in hydro you'd be limited to hydro nutes. So, you couldn't really do organics or at least is harder.
It's kind of up to you and what's important to you.