If you need a good deal on sweet pre finished hardwood let me know
I can get
Armstrong
Bruce
Lauzon
Mercier
Mirage(the best)
the durability and finish is leaps and bounds better than a sand and finish app. Especially when they formulate aluminum oxide into the finish. I'm sure your cousin will try to talk you out of it, but that's common for floor sanders to not know shit about products.