Posted: 21/06/2017 at 08:11
For the job to be done properly you are looking at well over £100 per square metre, probably nearer double that. It is a major undertaking. From the photo it looks like something in excess of 100 square metres so you do the maths, preferably when sitting down.
As others have said, paving does require maintenance too, and if it doesn't get much sun can become slippery from algae and moss. That needs to be cleaned annually and requires a decent pressure washer to do it.
Looking at the current state of the lawn I can certainly see why you're considering removing it, but it would be cheaper to get somebody to come in and look at ways of recovering it. A local garden centre or nursery should be able to put you onto somebody who can help.