Is it hard to install a sink? I would love to replace the vanity in the our master but I’m scared to DIY it.
I don't think so - I did one in my daughters' bathroom two years ago and it was fairly painless. The only thing I didn't really pay attention to was the type of faucet we needed - the new vanity had a big cutout for the faucet and spigots, instead of separate holes for each, so I HAD to purchase a faucet that was all one piece, like the image below. I would have preferred the spigots to be directly ON the vanity top, but it's a minor thing
namasteak- It's not hard but like amandakisser said, make sure you get the right type of faucet. The problem I had was that the plumbing coming out of the wall was a funky set-up so it was hard to get that done so it wouldn't leak. But if you have normal plumbing, it's not hard.