Your value to a company has nothing (AT ALL) to do with what you personally need to live on. That shouldn't enter into the equation.
I make more than the proposed compensation and am no happier than when I was making half of that. I probably did something wrong in making my arrangements but it wasn't in the money department.
Turns out there are lots of people who are attracted to the allure, and a limited amount of space.
The pay does reflect how much value you bring to the company. The better you are for a position the greater value you should be providing and your pay should reflect this.