Pre-submission enquiry taking a long time
Keep in mind that many faculty members (like myself) are still on Holiday Break and may not be checking e-mail as often as they would if the semester was in session.

That being said: I would wait until January 21st (which is typically the latest date for a semester to start) and reach out to the editor again (politely, of course).

If you still do not hear anything back, I see no problem in moving onto the next journal. After all, if you do not hear anything back, is this the type of journal you would actually like to submit your manuscript to? It doesn't give me confidence that the journal's review timeline is much better.