DIY is possible, you have too much light though, a shop light with a good reflector will do nicely.

Overall, non CO is easier once set up and if you can keep your hands out of the tank and start the tank off right(eg do not take short cuts on the set up).

I use a larger hose that drains the water right outside in about 2 minutes for large 50-150 gal tanks. I fill using a garden hose adapted to the bath/shower faucet. Refill takes about 4-5 minutes for a 55 gal tank. Draining takes about 5-6 minutes. 70% takes about 1-2 minutes longer.

Regards,
Tom Barr