e-machineshop is a free proprietary software you design a part and e-Machine shop uses the design to generate a price quote for making the part.
if the quote is acceptable it goes into there cam software and they make the part or part for you.
it is not intended for a HSM guy to design parts to machine himself.
Alibre cad is probably the most affordable usable 3-d software to generate drawings. IIRC it like $200 for a licence these days .
heeks cnc is a cad cam combo. not sure if it generates drawings. it is free but you pay for training.
Cam bam is a cam program with some drawing capability.
$150
Draftsight is a good free 2-d drawing package.
Hope this helps.
Tin