Woohoo buddy, that looks awesome. You're gonna be busy!
regarding your sketch-up Veg bin - if it were me I probably wouldn't go to the effort of putting the driver over your fan like that. My 60w Meanwell run warmish at full power, but don't generate enough heat to bother cooling.
YMMV of course, but I'd just let her passive cool somewhere out of the way.
Unless there is a big efficiency gain to be had with extra-cool drivers of something?????