FlySurfer said..
If you're working in the CBD, where's the nearest (good) place to kite?
How long would it take to get there if I left ~17:30 during the week?
Also different sites for N,E,S & W?
I used to work in Fortitude Valley/Newstead area, and I clocked off at 4pm. By the time I drove out of the carpark, up to Sandgate (freeway traffic was terrible) and got my kite up in the air, It was seldom to be riding before 5pm most nights.
530pm would be a stretch. Maybe you can start early and finish earlier? Also, with no daylight savings, I think you'd only have enough light in Dec/Jan/Feb to ride until late (maybe 7-730pm at the latest).
Give it a go! Any time in the water is better than in the office!