From the 'other halfs' point of view
With the Sportstar it was the great paint scheme, the look of your aircraft can be a deciding factor in the 'other halfs' approval.
With the CT4 I stood my ground for 3 whole days Slarti! In the end it was the smell of an old aircraft that got me and I gave in. I'm still impressed I held out 3 days.
About the cost - figure out what it will cost for a year based on your estimated hours. I allow for 150 hrs a year so it includes 1 years insurance, 2 x 50 hrly and 1 x 100 hrly maitenance, 12 months hangerage, 150 hours worth of petrol at a worse case senario price ($1.90 for the 2009 year) and also include magazine subscriptions, registrations for RAA, Warbirds license fees, airways charges etc. Then you put aside X amount each week/month into a separate account and all the costs come out of that. This way your supportive 'other half' isn't always seeing cash going out of the account for aircraft realted items. It still costs the same but you don't notice it