Youll make it work bro, just take a huge bonger and wander the isles of h. depot. What looks good for you is what you should go with. I painted my bare concrete floor with garage concrete paint. Works well and cleans up easy, only issue is where the table leg is it rubs off a bit with the weight.
I like water/humidity resistant material. I have learned over the years of construction, not just a grow room but many projects. O yeah metal studs arent much more than wood, but you do buy the stud and the track, track is the horiz, stud is the vert. Screw em together with self tappers.
good luck
hiboy