20 years ago I worked in a local wood shop and there were tons of koa, so much so that scraps were simply just thrown away. 10 years ago, when I purchased a custom koa uke, people were saying the wood was becoming more scarce. Today, I've been told that much of the Big Island koa is sold out of state to guitar and furniture makers. Even the local uke builders are challenged in getting top grade stuff. I hear sometimes local luthiers have to buy koa from out of state, and to think that it originated from here. Koa prices are definitely high.
Locals love koa frames for artwork, but these days, a solid koa picture frame is ridiculous. Veneer is becoming much more popular.
As for you and your koa instrument, I don't think there will be no koa by the time you are done with college. Uke builders often have years worth of wood, it's the premium stuff that seems to be harder to come by.