When replastering soon we're interested in constructing a small tanning ledge, 4x10', where the steps are and adding steps off the side of it. This is small, but we've been told that the gunite companies have a minimum charge that could make this small ledge expensive. The same guy also said there is another way to build the ledge that he didn't think was as solid as using gunite so he didn't want to do it. So what other way(s) are there to build a small tanning ledge without using gunite, and how solid are they? Thanks.