Thanks, I've been using this Do-it-Yourself lawn and pest control here in Oviedo. Pretty happy with them so far, seem to be real straight shooters. It's funny though the first time I strapped that 4 gallon sprayer to my back I was like "oh, this is heavy".
I haven't purchased the seed yet they recommended a 100 lb. bag. While I have full irrigation with a well, I am not sure how perfect the coverage is. Might be ahead to get someone to check it out first.
That is a lot of yard to till they seemed to think that overseeding would work, but I would think that the seed has a better chance of hitting dirt if you tilled.