Cost wise you are looking at a little bit more than a 172 but a lot more character and fun. At 100 knots (any faster is just turning fuel to noise exponentially) you will burn 45 litres of avgas (according to the Shadin Flowmeter). In terms of running costs the aircraft is VERY simple. Manual flaps, massive chunky simple undercarriage, inspection panels are hinged so less labour cost at annual time. Best of all, it's new so it comes with a warranty for those unforeseen problems and ADs etc.
I am fairly keen to push a larger proportion of annual/c of a costs into the monthly price so that members are encouraged to fly the aircraft ('sleeping' members tend to moan at annual time when they argue that they have not caused much wear and tear etc but I prefer to see the monthly as the cost of making the aircraft available to the member)
My target would be to see the hourly cost below £90/hr wet but I need to get cracking on sums to work out the monthly spend too, I'll let you know.