Now that you've clarified that your answer is really a compound one, I do agree that splitting it up is the right thing to do. Readability isn't even the main issue, I'd say; it's that some of your suggestions are going to appeal to a given reader and some won't. If you separate them out, users can judge which ones are good and which ones aren't, and upvote or downvote accordingly. Additionally, separating answers makes it clear that some suggestions are different than others.
That said, if two ideas are similar, or even variants of each other, maybe keep them together; you don't necessarily want to fragment variations on a theme. And honestly, if you find yourself writing maybe half a dozen equally valid answers, it's possible that the question itself is overly broad - and, yes, we're Worldbuilding Stack Exchange, but we certainly have standards, just like everywhere else. So consider trying to help the author narrow the question down, or voting to close.
Old answer, for posterity.
There's a limit of 30,000 characters per post, for both questions and answers. 30,000 characters is . . . a lot. A lot a lot. I mean, I write long answers in some cases, but I've only hit that limit a couple of times across the network. In the cases that I remember it was because the answers involved either a lot of code, quotes, and/or citations - in other words, it wasn't just 30,000 characters of plain text.
The thing you have to consider - and the thing I should have considered in those cases - is that there's a point at which adding more information becomes unhelpful. The longer a post, the less likely readers are going to have the stamina to finish it, and if that's true, more detail can, in the end, hurt you. If you're seriously considering splitting an answer up into multiple ones, you might have hit the point where editing down is needed (I'd put that point at about 10,000-15,000 characters for the majority of cases).
Moreover, even if you don't want to edit the answer down, splitting it up is just going to make it a headache to read. For most ways of sorting answers - either by votes or by recent activity - the mini-posts won't always appear together or in the right order. So now you have to link them together, but that still means confusion for the poor reader.
I very much sympathize with you about trying to not make an answer too large, but in the end, even if you split it up into multiple posts, there's still the same amount of information, and it's now in a format that's going to make things confusing and less accessible for readers. Take some advice from someone who's been there, and do your best to edit it down.