My question is what's under the table cloth? your tank weighs what 40 pounds? 60 x 8 pounds per gallon =240lbs 30 pounds of substrate minimal. a few rocks 10-50 lbs lights, filter,- your tank could be 400 pounds.
Also i would not go salt water your dark brown table cloth will need constant cleaning from salt creep.
one last suggestion before you do fill the tank place some plastic under the stand roll it up on the sides under your table cloth so when you set up or do maintenance you can drop the plastic and protect that nice beige carpet.