I mean of course people won't mind if it's what you have to do to continue the project. I'm absolutely sure though that half a year of updates for a character the player isn't interested in will have a high chance of them forgetting about the VN.
I think 3 or 4 months approaches the limit where if the player stops playing that much, there's a high chance of them not caring about the game anymore.
A few reasons for that, one being that you now forgot a lot about the game, but not enough to have fun reading it again because you still remember all the major plot points, and you'll also instantly remember again as you read.
To minimize that, I'd do what you are probably going with, do popular characters first.