Reducing mortgage on Principle Place!

Hi, I’m hoping someone out there has a quick answer to my predicament. About a month ago we (my girlfriend and I) settled on a house to live in and renovate. We haven’t yet moved into this residence because we haven’t sold our current principle place of residence. We then decided to rent out our newly acquired property on a six month lease in order to save a little on interest payments and to give us time to sell our current property. So we now have a tenant in the new house but our interest payments are still very high. We have two other properties that are investments and I am wondering if you can draw up the loan on one or both of these properties in order to pay off/decrease the mortgage on our new property. The new property is now an investment property (for six months) so I wouldn’t be mixing investment money with personal money.

Is there anyone out there who knows about this kind of thing???

Regards,
Wayne.