I saw that one. I can't imagine cutting heavy steel with an angle grinder like that. Just the disc cost would soon pay for one of the Harbor Freight horizontal band saw. Plus you would end up having a saw for other things. I have one and was well pleased with it, a little tune up on it and it cut straight and square. Then I got a more expensive one from another machinery company. No matter what I've done it will not cut square.
I really still think your under estimating what will be needed to convert the splitter.
The heart attack thing is pretty much what it is, and just have to limit my physical exertion. No more lifting 100 pound logs into the back of a truck, then stacking them, and then lifting again to split them. But at 71 it was getting old any way.
The cutting part isn't a problem... My grandfather, and my uncle both have machinery to cut big pieces of steel; so that's not much of a problem. Only thing I think would be hard with one of those is finding the material, and getting everything aligned properly.
Yeah my grandfather says the same thing... He can't lift many things anymore, he's gotta take it easy.