Brian is proof that it can be done, but maintaining a steady output of one $500 knife a day, four days a week, year in and year out, and having a steady market of new buyers for them seven days a week ,year in and year out is a hard thing to do. In 20 years you will have made and sold 4000 knives to 4000 different people. At many big knife shows, there aren't 4000 knives sold during the entire show.
Be aware that from that $100,000 you will spend:
Materials - from $10 to $500 per knife
shop cost - rental/mortgage, utilities, maintenance, propane, belts,abrasives, overhead, etc.
machinery cost - From $50K to $250K depending on production volume and knife styles.
insurance - health, homeowners/business, fire, liability, etc.
business licenses ,taxes, and fees - City, State, Federal, Incorporation, accounting, Hazmat fees, advertising, etc.
travel, lodging, and show fees - $1000-$20,000
Beer money ( probably should be under shop cost or materials)
New hat for the wife once a year ( should be under fees and taxes) - If Mama ain't happy, ain't nobody happy!
So with $100K on one side of your ledger, you will be lucky to have $10-20K left as profit at the end of the year.
If your wife has a good job with insuracnce...and your home is your shop...and it is paid for...and your kids are grown and gone....and you are a top tier maker who has re-sellers sell your knives for you.....then that amount goes up in the end, but it took a lot of time and money to get there.
I would guess that most every successful knife maker invested $100,000 to $500,000 before he was making anything like what we would call good a good living wage.
About the only way for the volume of work needed to maintain a good income is to have some other sources sell the knives for you.
Some hit it big, and would consider the $100K example of "success" as being too small. Buck has sold 15 million model 110 knives. Ken Onion creates a design, and licenses it to someone to make and sell...and gets a check for each one sold.Buster and Julie Warenski sold $20,000-$100,000 knives. These are all successful knife makers, but are a tiny fraction of a percentage of the knifemakers out there. Maybe half of us sell $100 knives to 10-100 customers a year, and the other half sell less than that. That won't work as a business .
Bottom line is that most good businesses make 10% or less as the final profit.....many only clear 2-3% profit.
I still like Cleston Sinyard's statement, " If I won a million dollars in the lottery tomorrow, I'd still keep on making knives for a living....until it was all gone."