I have just about every sharpening device known to man. They all work. Some better for certain things than others. I am 50. If i had to do over, time is money. I like fast & efficient. Get you a HF 4"x36"/6" disc belt sander & a 1"x30" belt sander. These 2 items along with some good Diablo Belts from HD. They will save you hours & hours vs doing it all by hand. I get the burr, then finish with a swipe on each side of my Dexter-Russell 14" Butchers steel. Practice with cheap blades first. Machetes on sale are good practice. I can sharpen 3 super dull CS Machetes in under 10 min & have them shaving paper & hair. Yes, you CAN use machines without destroying the edge or the knife, a gentle touch is needed. Once i have thinned the edge to where i want it, i have never had to take any of my blades to the sander again, one swipe on each side with the Butchers steel keeps them where i want them. Easy peasy.
Just thinned the edge today on my Old Hickory Cleaver & put a choil/finger loop on back side of blade (with my Dremel) so my finger don't slip/slide into blade, all in about 10-15 min tops. That included getting tools out & putting them away & getting water to keep it cool. Right tool for the job = quick, easy with good results.