I would estimate the CAD work on this model to be about 50-75 hours after reviewing the drawing. Closer to 50 if the trucks are already available.
Please bear in mind that this is time away from someone's real modeling, family and other obligations, not necessarily in that order.
I have found that since there is little profit to be made, and an even smaller audience that "needs" the model, it is not worth the time, without some form of compensation. At 50 hours of my time, I doubt that anyone is willing to pony up.
"Ford the love of the hobby" is not compensation by the way (and yes I have had someone approach me with that)...
The things that I have currently modeled are things that I need, so if someone benefits from that great, otherwisa I simply cannot justify the time without compensation.