I am writing a review paper in the field of engineering.
At the moment the paper is 20 pages and I am afraid that this goes up to 80 pages when it is finished.
I was thinking about making it open access. However, I am afraid to break the paper into several parts and pay the open access fee multiple times which I definitely could not afford.
Could anyone please advise how much is the page limit for an open access review paper in IEEE and Elsevier. If my paper is not publishable there, where else could be a valid and feasible journal for me?