Well I went straight into Plus 8 ownership 12 years ago and my good lady is not a fan but loves the fact that I do enjoy them.
It cost me a completely new oil fired Grant boiler and radiators we were Electicaire prior to that. New bathroom upstairs. New shower room downstairs etc.
I have to add that I just returned home from a business trip and dropped on her the fact that I had just bought a Plus 8 for £25k, it went quiet for quite a while & then I let her know I was picking it up next weekend.
So probably the best advise I can give you is to pray.
I think she came out ahead on it all financially but hey it's only money and it keeps people in a job

I haven't stopped smiling when I'm driving it yet - this is my 3rd one - be warned...
In answer to your question start bartering...