ratsarrse,
I don't think you'll get an Auster or cub for 10K, more like 15K plus. Some are on a permit, so are cheaper to run.
You pay a premium for Cubs so could be a lot dearer
A few Cub groups about, usually 4 to 6 people so a share will be 2.5 to 4K. But pretty cheap per hour costs (25 to 40) depending how they split it.
Difficult to beat that type of flying, but I'm biased.
CC
"There's many a slip between Cub and strip"