I voted to close as not being a real question. The title alone shows what is the problem of this question:

... (multiple questions)

This is a Q&A site. People have questions, google them and hopefully find their answers here. One point to get a good result in the search engine's index is a meaningful title. Look at it:

.../questions/3208/publishing-fantasy-versus-realistic-fiction-multiple-questions

Collapsing different questions or not, is not the problem here. We have a vague undefined question, which shows that the OP is not sure what he really wants to ask about. I even doubt, that he owns fantasy books, otherwise would be Q1 obsolete.

So this questions needs to be restructured, probably split in two or more questions to get defined, answerable and searchable questions.

I voted to close as not being a real question. The title alone shows what is the problem of this question:

... (multiple questions)

This is a Q&A site. People have questions, google them and hopefully find their answers here. One point to get a good result in the search engine's index is a meaningful title. Look at it:

.../questions/3208/publishing-fantasy-versus-realistic-fiction-multiple-questions

Collapsing different questions or not, is not the problem here. We have a vague undefined question, which shows that the OP is not sure what he really wants to ask about.

So this questions needs to be restructured, probably split in two or more questions to get defined, answerable and searchable questions.