I suggest you follow the step-by-step guide for creating storage cabinets under the bathroom sink. Take proper measurements - Measure the available available space in height, width and height. Cut Plywood to size - With a circular saw and framing square, cut all the required pieces out. You can use a sliding compound saw as an alternative. Attach the base and sides - Start assembling the sink cabinets by placing the bottom piece of plywood sheet on a flat surface. Attach the back and top boards - Place the plywood sheet for the top part of the cabinet and attach wood screws to connect it to both the sides. Turn the back faces of the cabinet upwards. Keep the back piece over the structure and fix it into place with wood screws. Attach shelves - Place the cabinet in an upright position to install the shelves. Slide a shelf into the structure so it is flush against the back. Attach door - Keep both hinges of the door on the same side of the plywood sheet. Drill them using wood screws into place. Now keep the door over the cabinet structure, extend the hinges to one of the side panels and fix them to make them secure. Fix a hasp closure on the other side of the door, placing it in the center of the hinges.

hi, you can select from 'Noken' brand designed by renowned Architect Norman Foster... they do really have high quality vanity.

Also, I would like more counter space. What size of the sinks should I get? 18 inch? Thank you.

Try to keep a band ( designed metal or board ) around the sink on three sides , which can makes the water spill less on that three sides ....or try to keep a rectangular hole on corners around sink for slab which doenst look like hole and get a decorative cover for that, and connect that to the outlet at down...so that its easy to push water around the sink so that it drains... Or get an extra slab just to place around sink where water spills and place it on top of existing slab if you don't want to remove the existing sink and place...