Nice work!
I'll give you advice IMHO:
1. Start our venture as a hobbie to test the market.
Dont waste time & money on gov. formality without a test.
2. Make small, easy modells for free, to get traffic.
Provide LOD,interior,door animation etc for large ones.
Use good 3rd party sites that show your brand.
Research different online business models ie monthly subscriptions
3. Blender is not built for game asset creation.
I would recommend any low poly editor over blender ie fragmotion.
Research better asset tools/workflow, spend the money if it makes your work faster and/or easier and you can recuperate it back.
Not sure how efficient it is creating high res models.
You're a talented modeller, its hard work and very competitive!
Make it fun and enjoyable for yourself
All the best with it!
"The only rule is, the sketch has to be in the Medieval, or renaissance genre."
Why limit yourself and income potential?