I don't know if @inventorofthefuture is still interested, but this project falls into an area of rapid prototyping that I am interested in. Requests for one-off controllers are quite common, but people always underestimate how long it takes to put together. The classic tradeoff is cost vs design time vs assembly time.
If you used off the shelf parts such as the Grove system, you could assemble the hardware pretty quickly. You can buy off the shelf power modules, it's not worth creating those from scratch.
For fun, I created a project in KiCad. JLC do PCBS for $2 + shipping, it's actually cheaper than stripboard, more robust and saves time wiring.
pcb by donotdespisethesnake, on Flickr