Hello @Anonymous I see that you are visiting as a new member to the Inventor Forum.
Welcome to the Autodesk Community!
It really depends on what your requirements are.
Do you need single, dual, quad extruders? Meaning 1-2-4 different filament types/colors being able to switch between.

There are some that have PLA extruder(s) and a Water Soluble Filament extruder for the support structure and when done you submerge it and then have your shape which without wouldn't be able to support.
Water-soluble support material
Depending on the material you are using there are different requirements. Some materials come in different thicknesses and have nozzle, bed, and temperature prerequisites.
What I learned from reviewing 30 different filaments
For generalized 3d printing I bought one for $130, put together myself, and remade simple car parts and plastic things around the house. Worked great but for commercial use like yours it wouldn't hold up.
Comparing 8 Affordable Printers
For creating good prototypes, what is your definition of good; strength, smoothness, accuracy, multi-color, material?
Are they for visual conceptualization or use prior to final mold injection? For plastic prototypes of metal final manufactures? Scaled reproductions?
Do you want to 3D print in plastic, flexible, wood, metal?
Prints Wood, PLA, ABS, TPU
Have you looked into Continuous Liquid Interface Production (check it out just for fun, looks promising for speed)?
What Is Continuous Liquid Interface Production (CLIP) 3D Printing
Without defining what you're looking for it's difficult to suggest anything. Analogy would be having 5-10k to buy a car, but not specifying for off road, hauling, commute, travel, or leisure. I'd suggest you a 1973 Volvo P1800 ES but if you have a family of 6 you're going to hate me.

There are many experienced 3d printer users in the community so the more information you provide the better we can narrow down your search!
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