Being new / old school student, teacher and practitioner, I have to ask.
Is this job capable of being done 2-D?
The old school may be cheaper and better.
or involve complex 3-D cavity contouring, x,y,z size,
shot volume, runner design, ejector pins, slides, threads, plastic, or zinc/aluminum metal, over/under rockwell 64, tooling budget, ??? etc.
Much depends upon the part you wish to produce and the quantity. Sure, I have worked on molds for Detroit which were guaranteed 500,000 cycles and Aerospace concept molds used 5 times. Or even Space Shuttle tooling for three parts, then throw away the tooling. There are many ways to accomplish your parts.
Please, I need more information to be of assistance.