What don't you prepare both cars (116 and 108/9) and Karen can drive one and I drive the other, but I still will look at doing your bodywork.
You do mechanical and I do body....
I see some issues with 2 cars
Space
Transport
Time
Karens involvment would be minimal for the first season, a few practice laps and some training so she can relay car set up wants/needs.
How about we start with the 109 and add the 116 later?
I know my way around a 109 so the lessons will be learnt earlier then I can apply that to a 116. The experience preping a car I know will make a 116 so much easier.
Just my thoughts
And I know you will enjoy the 109