We operate a Yak52 in a group of 4 people. Currently we are charging ourselves £100 per month each and £35 per flying hour dry.
This gives us enough in the bank to cover the basics such as insurance, parking fees and routine maintenance, but NOT anything towards an engine fund (it would be another £25 per hour for that). Obviously we get 'hit' for the unexpected such as the need to put the animal on a UK Permit and have to dig into our own resources to top up the account to pay for that. Generally the cost of parts is a lot less than for a 'western' aircraft.
We took the decision not to start an engine fund as it would make the hourly rate look quite nasty. It appeared best that we invested the money ourselves in private savings accounts to mount up over time. As we are currently flying a total of approx. 100 hours per year this would mean we have around 5 years to save up the cash.
The cost of consumables depends on how you fly it. In the cruise we get around 60 litres/per hour from the Avgas, if you do lots of aero's you could easily double that consumption. Also oil is coming out at around 0.75 litres per hour in the cruise and about 1.1 lph during aero's (mostly dumped through the breather down the side of the fuselage).
An exact pounds per hour figure will depend on how much flying you do per annum. In summary, I think the aeroplane is worth evey penny. As someone else once said 'the best bangs for the bucks'