Annual Cost of Ownership

I am considering purchasing a 2 or 4 seater. I can justify the cost of the
plane, by the off set rental fees, but I am not sure how much I need to
budget for other fees, insurance, tie down, gas, parts, maintenance, etc.

I am looking to spend around 25k on the plane, nothing fancy, just something
to build time in. If need be I will spend a little more to get something
that is IFR certified so I can work on my rating.

Any advice, experience with additional costs would be apprecitaed.

Thanks,
Tom