Best cost effective tub / shower walls for apartments? Solid surface / tile?

[Max Amillion]

Our buildings all have tub shower combos that are standard 60” length. Looking for something cost effective for tub wall surrounds in apartment units with as little seams as possible. I do not like the flimsy plastic wall surrounds. I prefer a solid surface, tile or something similar like hotels do. Prefer each one of the 3 walls in the tub/shower combos to have no seams. I have not had any luck finding a single piece of tile or solid surface for the 60”x 60” (ish) main wall. 
I found these at Home Depot for only $82/piece (32”x64”). https://www.homedepot.com/p/MSI-Calgary-Onyx-32-in-x-64-in-P...
The pieces would cover each end of the tub/showers with no seams but I would have to use two of them for the main tub/shower wall... So 4 pieces total. The pretax cost would only be $328 so not too bad. Does anyone else have a better solution? What are you all doing for a good tub/shower surround in your units? I’m going for as little seams as possible.I  like the way hotels do their solid piecing but no clue where to get materials. I see solid surface kits for $800+ but I’m not wanting to spend that in apartments when I found these 4 tiles for $382. Guide me please!!