GLC, I think it's wonderful that you are doing research towards doing something you love.

I just remembered another idea for you -- I don't recall how close you are to Portland, but maybe volunteering at the zoo could be good stepping-stone experience? Many years ago, a colleague of my husband's took a sabbatical to do exactly this: she basically shoveled poop and helped feed the animals for 3 months while applying to vet school. She ended up never going back to work at her old job!