I share a 2006 G2 SR22 with 2 other guys for the last 4 years and our costs have consistently been based on £240 pcm each that covers hangarage, insurance and contribution to annuals which have been around £3K, we have recently put this up to £300 pcm to build a bigger maintenance fund.
We then charge our selves originally £110.00 pertacho hour wet which we have now increased to £120 per hour with increased fuel costs and there is a proportion of this goes towards ongoing maintenance.
A fantatstic aircraft and if you really want to learn more join the owners association
COPA Cirrus Pilot Proficiency Program (CPPP) - Cirrus Owners and Pilots Association