Delay, delay, delay.
Trying to put interviews off until January would be good - or at least until after October 15th. Ask if you can delay but don't give up an interview if they are inflexible. I've noticed that those who have greater than 10 interviews are likely to have October 15 acceptances.
By October 15, you may fall in love with a school. Or by Thanksgiving. If you don't fall in love by then, then at least you might have an acceptance and can be more picky.
As far as deciding - I think most schools publish annual Cost of Attendance like
this. That is the amount that financial aid/loans will cover and will vary by school/location.
With 10+ interviews, start a spreadsheet or log and put down the cost of attendance and other info for each school. Then look at last year's thread(s) for your target school(s) for info on who gets scholarships and what amount. Maybe send PMs to some of those acceptees and ask them if they're willing to share amount of scholarships. Look at the school's website. After acceptance, focus in on that school(s) and perhaps call admissions and ask when scholarships are awarded, amounts possible etc.
You don't have unlimited options now but you may soon. And you can limit interviews later if money is an issue.