In terms of speed, stability, reliability, flexibility & easy to code faster which ones would you suggest.
6 months? :loco: , I guess it was a typo?
to develop a SEO tool like SENuke?
I hope you're seriously not trying to make another SENukeX, UltimateDemon, MagicSubmitter, etc. bot. You will not beat these three. Don't waste your time unless you're going to:
* offer a low one-time fee (which you won't because you want to earn money); or,
* offer a low monthly payment (which you won't because you want to earn money)
Soooooo many have tried and failed to de-throne these kings---igniteSEO, Vi Submitter, etc. Just don't do it. You shouldn't try to make tools that already exists.
How difficult is it for a well experienced person ( 6+ months ) to develop a SEO tool like SENuke?