Rebuild Vintage Edge-Lit Clock

I have a small desk clock with a beautiful vintage edge-lit display, a bank of mechanical relays, and an Arduino doing the time-keeping. Unfortunately my first build was amateur—cold joints everywhere, wires stuffed into screw terminals, no strain relief...... (Budget: $150 - $500 USD, Jobs: 3D Printing, Arduino, Electrical Engineering, Electronics, Embedded Systems, PCB Layout, Product Design, Soldering)