As a rule of thumb, when making a senko style bait yourself.. if you had to ballpark... what would your price per bait be? (Including all materials and molds, etc...)
You'll never make a profit considering the number of lures you'd have to make and sell to even cover basic expenses and time. Besides, a few different size Senkos would required different molds;
different colors would require many dye and glitter colors ;
many lures are always left over and sitting unsold (competition is tough)
some states require state tax included;
unless you order 50 gal. of plastic, a gallon is expensive per lure;
to mass produce lures you'd need multi-cavity injection molds which run over $150 each
Senkos aren't cheap - 70 cents each. Will yours be of the same quality?
Where will you advertise and sell them? Sites cost money. Even Ebay charges a fee.
When I make different lures for friends I only charge shipping.