I used a tile saw for many years. The only problem with using one is wasting rough due to the fact that the blades are much thicker than a dedicated trim saw blade. I would not use a tile saw for trimming expensive rough but it will work fine for relatively cheap lab created rough to get them down to a manageable size. I am now using a Rock Rascal model J with a thin 6″ blade. Tile saw blades are 7″. The rock rascal is about the cheapest option out there and is a good machine. The higher price for trim saws has to do with such a limited market and not worth the effort to manufacturer in large quantities with competition between big companies.