Some things that I learned about renovating is make a list! I was very involved in the whole process, and was in charge of getting a lot of the finishing materials. I didn't make a list--just kept everything in my head. Not good because I forgot some of the minor items. Like shower curtain rod (which had to be special ordered) and lighting sconces. Those small things have delayed everything being 100% done. Also, measure out your walls, the size of the shower/tub and anything else. Write it down and take that paper when buying materials. It makes it so you don't have to make multiple trips to the hardware store yet making the whole process delayed.
I found some great online resources. Some of them I'll share next week. But one online resource for very reasonable priced Italian cararra mable was Builder's Depot Direct. They sell very competitive pricing for tile especially Cararra tile. The only thing is you have to consider shipping, but they have a program for lower shipping rates.