Where to put Insteon Inline Linc
So I built a house a few years back with automation in mind. Basically I ran all lighting romex back to a closet in my office. I have 4 15A feeds to 14 relays. The 4 feeds each feed different quad blue boxes that have insteon inline lincs in them. This was enough to pass inspection but looks hideous. I decided with a new project I have coming up and new inspection that I would relocate all my equipment into the garage. The low voltage stuff isn't an issue, but I am worried about the 120vac stuff. I would have originally done this but I feared it would get too hot. Now I know that isn't true.
My question is how to put all of this 120vac equipment into something that is to code? I am installing two new subpanel (one for low voltage and one for high) but have no idea what to do with the 120vac one that will have all my lighting relays in it. Do I treat it like a normal subpanel and just install the relays inside attached to the breakers? (I feel like this isn't right). Can I use some sort of DIN rail system? Do I just wire nut it all together and put a cover on it? (I feel like this is to code but not the prettiest.)
I do plan to add solar shortly and would love if I could use the same box for both. The box is 42"x14.5".
Thanks in advance for any ideas or insight.