Dale,
Absolutely go for it! Its a great idea... I dont think you'll get rich doing it, but it will fill in some of the free hours you may have...
Print up some cards, or small flyers, and when your out and about, and you see a pile of bucked logs in someones yard, drop in or drop the flier in the front door.
honestly, i think your prices are a bit cheap! Most people will only have a cord, maybe two, sitting from a take down. They get a little better price from the tree guy if he can leave the wood, and they think they'll split it and burn it in their fireplace.. But there the pile sits.....
You gotta count your time getting there, and getting home.. and fuel for the truck and splitter.. If you do a cord an hour, and they only have a cord there, then 35$ hardly covers the fuel, oil, and wear on the splitter and truck.
Personally, i would say 50$ first cord (have to stack, or estimate a cord), 40$ second cord, 35$ there after...
Have fun and good luck,
Ron