I think what keeps me motivated is the constant attention the SPS need, you can't ignore it, and if you do......you pay.
Now I have this nano cube that has an Sebae, a piece of frogspawn, and a maroon clown in it, because it needs very little work, I always forget and ignore it. Troubles me, because I don't want to neglect the livestock as I do.
Its pretty much maintence free........which sound like the exact opposite of what you want.
There are ways to achieve this with minimal stocking and wise livestock selection.......which may make an interesting thread to dicuss. "Low maintence tanks, for the busy reefer"