Need advice on changing from one sink to two in bathroom
I am about to remodel my master bath and we are gutting the bathroom. I am going from one sink in the vanity to two. It is a 60" vanity with marble top and furniture like bottom from Lowe's. We are gutting ourselves and we have no experience with this.
I am going to hire a plumber to do this work but have received three quotes and three ways of doing it so I am a bit confused.
My question is: Can we use the existing plumbing to go from the one sink to two? What would be a ball park figure (expected amount) that I should expect to pay for this job?
Three plumbers, three ideas, three different prices: $200, $600, $1200.
I can post pictures if this would help give me an answer.