You will easily be published and the salary depends a lot of the popularity of the manga, it could change if the manga is more or less popular and that is a consequence of the talent of the mangaka.
lets say, the artist has never been published but has years of experience doing manga. what would be the minimum rate for an artist with no pro experience doing a non colored manga page.how much for a colored, as well? i hope someone could answer.
And there's also the fact that the salary may be different if you publish your manga in a magazine or if you publish it as a book.