Tough call nowdays, Tip...I'd have to agree with Scarbelly on this and play it a bit on the safe side by starting with what you can use on the side and expand as needed. The inventory costs and storage alone could put a guy in debt beyond recovery, if you go in too deep, too fast. Growing pains, as corporate company employees call it...the company tries to get too big too fast, and they end up folding when the the pressure is on if they don't have the momentum to push it all the way to the finish.
The thing about me is I'm pretty conservative, and I like to carefully weigh my options if time permits before I make a decision. That's not to say that it always works out in my favor, just how I try to make the best of things.
This could be one of those make ya or break ya situations, and the more you put into it will multiply the end result, whichever direction it takes...either it flies high and straight, or it crashes and burns. Like others have said, you won't know if you don't go for it...how deep you go is up to you.
Best of luck, and my best wishes to your family as well. I would like to hear another success story here, too, so keep us informed, please.
Eric