Make it a wheat beer or something in the 1.030 range, and you could have respectable beer in the glass in 14 days. I wouldn't bother with finings like gelatin. (Of course for wheat beer that's a given anyway.) If it's a wheat beer, just keg it on day 12 and force carb to your heart's content. If it's just a light session beer (non-wheat) and you want to crash out the yeast, then the night before you keg (say day 11?), set your primary fermenter in a cooler with ice.
If you're doing all-grain, mash long at a low temp (75-90 minutes at 150° F or less) to make a highly-fermentable mash. This should help get the bulk of primary fermentation done within the first few days so that the yeast can be in "clean-up" mode for a week or more and your beer won't be as green on day 14.