I'm in a similar situation Brock47. I am a developer and builder and my wife and I own a very successful company. In the old days I did a lot of the work on our homes, especially trim and intricate detail work on some projects. Those days are long behind us and I'm no longer involved in performing actual field work. Though I design quite a few of our projects and get a sense of real satisfaction from that, I missed not actually having my hands involved in producing a beautiful finished product. I am a big gun guy and do a lot of work on firearms and knife making seemed like a natural fit. I enjoy holding some of our favorite knives and thinking of a way I might be able to improve on the design, and designing and creating something from scratch. I find satisfaction in seeing my skills improve, and looking at pictures on this forum and realizing there is a long, long way for me to go and much to learn. For me success would one day be producing a knife of sufficient quality and beauty that I would feel good about taking one or two with me to something like a gun show to use as trading material, or to make gifts for special people. Our homes are known for having amazing kitchens (my wife does all of our kitchen design and she is a very serious cook) and I would really enjoy being able to present each new homeowner with something like a chef's knife that I made.
I truly believe that success is the quality of your journey, and I am enjoying the knife making hobby immensely.