First, if you'd like to take another step forward, I recommend silicone molding your 3D printed part. You'll need to spend a lot of time sanding/prepping, but you can achieve a surface quality similar to injection molding if done right. Your tooling investment will be well under 15k and you can do small batch runs to test the idea. I've seen some product runs under 1k parts that came out looking flawless and were 100% commercially viable.
You can experiment with the type of silicone you use and the type of polyurethane you pour into the mold. You should be working out all of the question marks here. Things like, strength, durability, weight, feel, aesthetic, and more.
BJB plastics has some great silicone products, awesome customer service, and a number of videos up on Youtube to guide you along. They aren't the only ones, but they sure are a great resource for asking questions.
Hope this helps. Good luck!