So after plenty of research and plenty of procrastination, I've put together a one keg/one tap kegerator.
I went with a fairly inexpensive, slim fit, thermoelectric bar fridge. I was a bit worried about it getting cold enough but its perfect (more on this later).
It fits a 3 Gal keg, co2 bottle, and a few small and large beer bottles in the door and on the rack.
The tower is insulated with roof insulation and i have copper piping running all the way up the tower. This leads down to a T, and has a further 2 feet of copper running into the fridge.
I've also added a small fan to help the circulation. It's running on a timer and cycles every 30 mins. It's running of an old 12v adapter.
Initially, the temps ran at 0 celcius (32f) at the bottom and 5c (41f) at the top at its lowest setting. But after running the fan it's settled at 0-2c (32-36). This is in our summer down here too.
I've only just kegged my first beer (an ipa!) so I haven't poured anything yet besides pbw