Toasted Owl, I highly recommend saving gold to buy another nest or evolution building. Those are solid game enhancers that will serve you well. However, if you're gold/cash supply is not an issue, do what makes you happy. I'd probably spend less and skip the steps because after the event, Wealth will likely pop up in your breeding den - over and over.
If the prizes in question were Champs or other special hybrids I would, and have used gold.
Best of luck!
*just got 32 hours breeding Gold & Birthday...saving food and holding on to my loaded nests & dens for next event - back-to-back breeding, using up boosts, not fun.