Erik,
Many designers/manufacturers started as hobbyist, building something for themselves. Friends/aquantinces hear their handiwork and asked for some to be built for them. You could start this way. Build for your friends, build some and pass them on at costs to folks who will review them for you, then expand. Several speaker builders have done it this way. It’s not a fast road to riches and most fail/go under. But it is a way to start without investing (losing) too much money.
Good luck if you try it........
Many designers/manufacturers started as hobbyist, building something for themselves. Friends/aquantinces hear their handiwork and asked for some to be built for them. You could start this way. Build for your friends, build some and pass them on at costs to folks who will review them for you, then expand. Several speaker builders have done it this way. It’s not a fast road to riches and most fail/go under. But it is a way to start without investing (losing) too much money.
Good luck if you try it........