>>10012279Your model looks good as it is so I would probably have a modeler re-pose it in some kind of action pose, maybe with a gun, and print that to get painted up and displayed. Even if it wasn't articulated, it would still be different enough from your Lego guy.
If you do want to keep going forward with articulating the model, printing, and painting, I'd really suggest doing a lot more research right now before continuing on. Do you have experience finishing 3D prints and painting things too? Those are both more work that may not be as simple as it seems and you may frustrated with the result if you rush into it.
Thing is, the joint types on your articulated figure aren't too complex if the modeler knows how to construct them, and there really is a right and wrong way as to choosing joints and stuff. It all just depends on what purpose you want it to have. If you want a posable figure to be put in realistic poses, you'll need all the super articulated essentials - neck ball joint w/hinge, shoulder ball swivel hinges, bicep swivels, double jointed elbows, swivel hinge wrists, torso crunch/rocker, waist cut, hip ball joints, thigh swivels, double jointed knees, boot cuts, and ankle rockers. Even if you don't have one of those types of joints, there will be poses the figure will not physically be able to get into. Check out the joint systems of most modern Marvel Legends males, or GI Joe Classified figure. That's what a soldier type needs to be able to accurately get into realistic poses.
A 3D modeler who knows what they're doing and can execute well will not be cheap. If you want cheap, you'll be in for a headache and be stuck with someone with little to no prior articulated figure experience.