This has got me going.
I added up all the extras on my 4 seater to the cost of the current +4.
The cost would be 54k.
To a roadster it would be 62k.
We are getting close to possible new chassis territory!

Titus

2007 +4 4 seater
2017 Mini Cooper
2007 VW Camper
1996 Honda TRX300
2012 Husqvarna 216