Multi part Grp mold design cad surface modelling

Design details: We require a 3d cad design of a multi part grp boat mold that will be modular to allow for different lengths / ends of the structure. They will have matching profiles of parting lines with 15 different ends.
Both plug and molds will need designing. Scale models of the molds will need preparing for 3d printing.
We will also require the box section steel supporting structure designing for each mold to include caster wheels and clamps.
The final mold will be milled on a gantry CNC machine.
Please answer the following questions to apply:
Why is a draft angle required
What software do you think is best suited to design this model.
Would be helpful if you could come to an expenses paid meeting nr gatwick airport.
Ideas for the visual style: Modern
Extra notes:
This is for external hull only. Nda signature will be required.