Mike,
I suggest you build the No Weld Grinder. You'll get a great machine at a much lower cost than buying a KMG. I myself, would have built one, but I preferred to be making knives and had the funds to buy the KMG. You can purchase the KMG and have a second grinder in your shop when you're, oh, say, 17. Because I believe that if you can get a No Weld Grinder built, you'll be producing more knives, selling them and will have the funds for the KMG in very little time. I state this, based on the quality of your work at such a young age and relative lack of experience. You're doing fantastic work already!
Keep up the handle block selling too. Be fair to yourself when pricing your handle blocks. You're not cheating your customers when you make a reasonable profit!! Remember that, if you want to treat your customers fairly and continue to supply them, you'll need to make a profit to stay in business.
I would suggest that you send some of the nicest (read prettiest patterned handle blocks) to WSSI and add stabilized wood to some of your offerings.
Your father must be very proud of you, and deservedly so! Most young men your age, do not last long here, as they lose interest and move on to other hobbies, etc. You seem to be around for the long haul, and my best wishes to your continued success.
If you ever have knifemaking questions, such as construction, design, or how to do something....please feel free to give me a call on my cell phone (330) 284-3103.
Once again, nice work on the knife and congrats on the sale to your father!! Good on you!!!!