Prototype Mechanical Parts from Drawings

I already have complete mechanical drawings for a small assembly that contains between six and ten individual parts. Each part will be produced by 3 D printing and the first milestone will simply confirm that every component nests and mates properly for fit-and-assembly testing; functional loads are minimal at this stage.

What I need from you:
• Native CAD files in the package you normally model with (SolidWorks, Inventor, Fusion 360, etc.) for every single part
• STEP files of those same parts, ready for my manufacturing partners
• An assembly file that lets me run my own clearance checks
• A short note on print orientation or any critical tolerances so that my printer can replicate your intent

Please include an estimated schedule in your proposal: the time you will need to convert the drawings, generate the printable geometry, and deliver the first fit-check batch, plus any extra days you might require for small tweaks after feedback.

If this sounds clear, let me know how quickly you can turn the first iteration around and which CAD platform you prefer so I can align file management on my side.