Using REI for children's college fund.

[Robert Howard]

I watched an video by @Brandon Turner that talked about a property that he purchase and put a 15 year mortgage, so he would be able to refinance it about the time his daughter is ready for college.  My question is will it still be a good idea if interest rates keep rising because our economy has gotten better.  So that the interest rates 18 years from now is 9-12% from the bank.  I'm curious because I was about to embark on an investment for that reason. I think its a brilliant idea, but that crossed my mind. Any opinions would be greatly appreciate.  Also any ideas if the interest rates are that high, what to do to make it still work out.