Just a word of caution on using RTX for tiling.... RTX advertises 1.5 inch accuracy 95% of the time. Of course this is horizontal accuracy. Vertical accuracy is typically 2 times that of horizontal, so your looking at 3 inches. Is 3 inches good enough for tiling? Some would say yes, but you only have one shot at getting it right. Once the tile is in the ground, you can't go back and make adjustments.

Whatever sytem you end up going with, I would highly encourage you to go full RTK if you plan on tiling.