Ok ...this one was difficult to understand ....
If I understand you correctly It takes you about 60 minutes to create such a model but with a big chance that you have to discard it because there is a fault in it...
The production of the models is not very cost-effective, or at least not enough to start a mass - production...also because of the labour that goes into 1 single model....
Your biggest problem is that you have to do them one by one by hand and you do not have the means to create a usable stamp / mould to start a production line ?
Surely there must be someone here on the forum who can help you with this ... there are some wonderful craftsmen around here
Anyway .. the models ( WWII also ! ) look very , very good and they really deserve to get "mass-produced" ... besides that they are a truly amazing example of modeling
Keep up the good work mate !