The tile saw we bought over 10 years ago has paid for itself many times over. I do the rough and my wife does all the tiling. She's done 4 bathrooms (only one our own), our kitchen and one other as well as all sorts of small projects. Here is a saw very similar to the one we bought long ago.

http://www.mytoolstore.com/mk/370.html

IIRC the price has actually come down over the years and the saw looks to be even better quality. This is a DIY homeowner sized one, you 'll probably consider a bigger one. WooHooo!, nothing like a new diamond blade! Save your knees, use foam mats. If you are going to do a lot of cutting, ear plugs work wonders to conserve your energy over a long day. Leave plenty of time and light to do a proper grout job. Dried on grout where you don't want it, is a REAL pain.

glenmore