1 or 2 relays

ok hey it is I have a ton of stuff that I am going to be installing and i wanted to know if i should use 1 or 2 relays to do this.  I have a list of things that I would like to come on with the car and the sets of neon that I want to have power to only when the radio is on and some that are switched to turn on and off at my leisure. Here are the things that i want to turn on with the car that are not going to be using switches for me to turn on anf off.

2 Amps, 1 Capacitor, EDFC (suspension dampener controll unit), Boost controller (Electronic obviously), Guage controller (Defi Link), 2 small fans for the amps.

These are the neons that I want to have 3 switches for

neons in front under the driver and passenger feet

neons in the trunk for sub and amp lighting

underbody neons

Along with these three switches I would like to have a small either LED or indicator light that comes on to show that lights are on. But I do not want to use the lights that have a built in light.  I know i know it would be easier but I want to do it this way for a reason.

I am planning on using the remote turn on from the head unit and connecting it to the relay or relays. I also plan on using fuses on each item except the fans, amps, and capacitor.  Oh yeah this all just remote turn ons for the amps and capacitor.  I have a pretty good diagram drawn up in front of me but I have no way to dram it on the computer and post what I have come up with.  I plan on using 18 gauge copper wire for this project and since the length of the wire matters for what gauge it should be the furthest any wire would go is about 6-8 feet.  Thanks in advance