In this video I make a 48 inch vanity inspired by one my better half found for our bathroom remodel. Only there is no mdf in my vanity and I built it for less than 1/3 of the price ($2200 was their price) and that includes the epoxy pour counter top (I'll link the video in the description once it is published ) and sink
731 woodworks link right around the 6 minute mark but the whole video I think is motivational - https://www.youtube.com/watch?v=YL2gufyZ3_o&t=1s