I like working with ash, but you might want to check around for local prices. For me, I can get it for $1.50 a BF. Again, for me, it cost .25 a BF to have someone come in and mill the logs. Then, if I want to have it dried, that's another few cents a BF. If you have plans for it immediately, cool, otherwise you have to store it. It's a lot of work if you are only saving a few bucks.
Might be worth it, but then again, you might get more out of it selling it as firewood. :(