Relay mount

Hey all! I’m wondering about where to mount several relays and bus bars in my engine bay. I bought the aux fuse mount bracket that mounts by the master cylinder for my fuse block and circuit breaker, so that area is pretty much packed. I’m thinking over on the left by the firewall. I think I can fashion a custom mount. This presents wire run concerns. I’m planning a light bar, ham radio, dash cam, rear bumper lights, and an aux usb plug. Also, where would I tie in for accessory power for the relays? Solenoid? Any suggestions appreciated! Thanks