There are a few traditional ways of preserving eggs that I'm familiar with, one of the more popular ways to do it is the use of a substance called "waterglass" (which is liquid sodium silicate) another, more difficult way is the use of fermentation, much the same way as making sauerkraut from cabbages, and so on.
Off course, if you have a canning tool at your disposal, you could can hard-boiled eggs.

some other means of preserving would be keeping them (boiled & pealed) in salt water or (I've heard about this, not familiar with it myself!!!!) in vinigar.

If you ever get tired of eating all those eggs, I know of a few really good chicken-egg salad recipies ......


good luck