I spent $150 on a 150-lb home gym a couple of years ago; the exercises I go through with it, along with simple callisthenic and traditional core strength exercises such as sit-ups and push-ups have been sufficient to supplement my cycling to keep me as fit as I require.
On the other hand, I could easily see how having the wider variety of options in a controlled environment would be helpful, especially if there is a pool and running track available.
A personal trainer would be nice to have, to help target various problem areas, but I'm pretty sure that costs extra, at least around here.
I also hate and dread spinning in one place, and only used my own indoor bike trainer twice last winter; otherwise, I would rather ride around in the cold for 20 minutes than sit and spin for an hour...