Our cabinet was attached to the overhead light fixture by 2-3 screws, also screwed to wall along right edge of door frame. I had to remove both the cabinet and complete sink base from bathroom. The sink counter/bowl was stapled to the vanity base about 100 times around perimeter.
I custom ordered a piece of solid surface top to my specs, drilled my own holes for sink drain and faucet. I used shark bites on all connections under sink and had to re-plumb drain line. Also replaced "back flow" valve with a brass unit as I already had sink base removed. We then removed outlets and switches and put matching tile on 2 walls to match whats in the kitchen of our coach.
Was not a hard job by any means, just time consuming figuring out how and where I wanted everything to be positioned and installed. Total job time less than 6 hours, after having needed materials at hand and ready to be installed.
Darwin & Carla
2018.5 3701LK Montana
2019 3500HD Denali Dually Duramax