No idea how much it costs, but most solicitors do an initial consultation for free. I suggest you get a family recommonedation for a good solicitor andmake an appointment, clarifying that initial consoltation is free. Bring your full details with you in writing, making less work for the solicitor. That would be your marriage cert, why you are divorcing, list of assets, both your salaries etc. (That's what I'd imagine is needed). Then you ask how much. If it's too expensive, say so and maybe they'll negotiate. If it's very simple I don't see why it would be very costly but maybe there's a lot of work involved.