Took the old guest room and redid for new baby boy on the way. Used most cost effective way of decorating by finding unique items via Etsy.
Nautical. I wanted a room that didn't give you a headache when you walked in and screamed baby, but rather something he can live with for a couple years.
I would say I love cottage style, but I am pull pieces that are ecelctic.
Use coupons! Take advantage of free shipping sales and really use Etsy to your advantage. You can find a ton of great ideas/products on that site that wont break the bank.