I built some 98 hours with AGL on the C172R when it was at Barton, I even flew it as far as Spain (mmm.. VAT free fuel!)
I paid £110 a month for 6 months, but with a deposit of the same that I got back - in full. I then paid £60 an hour wet.
I did a few circuits, but mainly land aways. Don't factor in landing fees because you have to pay those whatever you fly, Westair, FAB, AGL or rent from Santa.
£60 x 98 = £5880 wet
+ £660 maintenance
-----
£6540.
If I rented with someone else, even at £110 an hour wet (which is very reasonable and probably too cheap for a new C172) i'd be looking at £10780. I make that a saving of (drum roll).....
£4240
Horgy