Instead of quests and crafting why not just balance it and add it to a very very rare special encounter. This would not allow it to be stockpiled by the larger factions and allow even the loners to have an equal opportunity to have power armor. I do agree with the point it should be unlootable, or if it is you receive a lower stat damaged version like the tribal version seen in the loading screen art.
Chi si ritira dalla lottaE' un gran figlio di mignotta!
IT. IS. A. GAME.*geez* Its supposed to be fun, which includes a friendly and helpful community of players.
The 3-4 week cooldown is a pretty good idea, though the recharging stations don't make a lot of sense in the original fallout canon.A self-contained suit of advanced technology armor. Powered by a micro-fusion reactor, with enough fuel to last a hundred years.