Get all your own materials on site so saving on that cost. Look to pay a full weeks wage for two men. This should take 5 days minimum, maybe 6. So 2 guys on roughly £200-220 per day for both of them. So say £1000 to £1300 for labour.
Flags want to be bought on eBay and delivered to site. A 20sqm pack is about £300. If near leeds get sand and base delivered from mones quarry in north leeds. They are miles cheaper than builder merchant. Only use sharp sand in your base mix. Don't use dot and dab technique, lay out the screed for the whole area of each slab. Proper job !
Skip £180
Flags £300
sand £60 delivered
base £80 delivered.
Cement £70
brick edging £ 100 for brick.
bld sand for pointing/laying brick £30
So £1800 - £2100 approx.
I am doing the same job in leeds for myself mid sep. Bricks were free from gumtree for my edging. Paving was £140 for 18sqm (indian 50% and smooth sandstone 50%). Both off gumtree.
Skip will be £180, maybe less if i need only a midi.
Don't need much hardcore as a proper screed of sharp sand and cement is fine for foot traffic only. So i think i will need 2 1/2 T sharp sand and about 15 bags cement, plus 1/2 T bld sand.
So £55 for sand and £70 cement
So my paving will be around £440-500. But my labour is free obviously.
Read paving expert to make sure the job is done correctly:
http://www.pavingexpert.com/home.htm