(Related to and inspired by this question)
In the post that I linked above it seems pretty well established that "There is no currently existing software that fulfills your request", possibly accompanied by a recommendation for development, is a valid answer.
My question is, would the following be a valid answer in the same context (no software exists that meets the question's criteria):
Unfortunately, no software currently exists that does what you want it to.
However, I can create that software for you if you're interested.
It seems to me like this is bordering on unacceptable self-promotion (especially if the answer makes a request for money), but I think it could potentially be acceptable. What does the community think? should posts like this be acceptable or considered spam? Should it depend upon whether or not money is involved?
Another thing to consider, as mentioned in the comments: what about if the answer is along the lines of:
Unfortunately, no software currently exists that does what you want it to. However, here's a batch file that will do what you want:
This answer provides a concrete solution, even if it isn't pre-existing software. Thoughts?