Hey Doc,
The minikeg thing has been on my radar for a while to try out, I just haven't had a chance. There's some great youtube video's out there explaining about them, cleaning them, as well as the issues you may face.
A quick run-down for you:
1) If you look around your local stores, you may be able to get a keg (with beer in it) for slightly more than the cost of a new one.
2) You can't use Heinekin or Newcastle kegs, they must have the pressure vent on top. Good examples of these are like Bell Oberon in the minikeg or Spaten in the minikeg.
3) Cleaning them can be a pain.
4) You will need to use 1/3rd the priming sugar for carb - no more.
5) The beer will oxidize once the vent is open, otherwise you won't be able to get any through the spigot. Maybe not an issue if you'll be finishing it within a day or so, but after a week it'll have an off flavor..
So - knowing that - I'll suggest an alternative. Sadly, this is ANOTHER experiment that I've yet to play with, so this falls into the realm of "speculation", though I can say due to research it's fairly popular in England with cask style beers - that's the polypin.
The Polypin is essentially a plastic, collapsible 1gal cubetainer (like a square box/bag of wine) that can be primed (1/3rd the amount of sugar again) and allowed to pressurize, then poured from and allow the "pin" to collapse as the beer leaves, so you don't get oxidation issues.
Polypins are more aligned with cask style ales (low carbonation, English style beers) than American ales, but I don't see anything that would stop you from experimenting with them if you're curious.
I've amassed quite an amount of info on them if you're curious, I'd be happy to pass on some links.
All else fails, you're looking at 9-10ish 12oz bottles, which isn't bad at all to rip through. Sugar cubes might be a great substitution to batch priming with such a small amount.
In other news -
After having a few

of the Brewfarm Funk#2, I couldn't help myself. After doing a fair amount of poking and playing with Brewtarget, I think I've got something close enough to take a swing with. That's going to get placed into the queue for sure.. Mmmmmm Belgian Saison.