I fly an Apollo Fox, a very similar machine. Running costs are limited:
* fuel @ 15l/hr @ your local rate, a bit more for the 100HP engine
* oil change once per year or once every 50 hours, more frequent if you run on Avgas. Costs 3 litres of (good quality) oil plus an oil filter plus a copper gasket.
Unless you fly quite a lot the fixed costs (insurance, hangarage) will be the greater part of cost.