"...the prudent considers well his steps" (Proverbs 14:15)
If you're thinking of installing your own tiles, here are some questions to consider:
I get a lot of calls from "Do-It-Yourself-ers" who decide to have a crack at installing tile. I can honestly tell you that even the best attempt by the keenest amateur usually falls short in some way...
I have had DIY-ers talk to me cursing the fact that they even contemplated such an undertaking on their own:
I have even inspected jobs done by "professional" installers (usually a general contractor or carpenter), and the homeowner has been bitterly disappointed. Go to my blog to check out one particular tiling disaster.
HOWEVER, there is a good reason why my clients are satisfied with my work...it's because TILING is ALL I do. I believe that taking your time with each tile, to make sure it's properly laid, level and even, is key to a beautiful looking job. Going too fast or not having enough patience are what will ultimately lead to an aweful job.