Recently spent a day with a financial institution who specialise in building wealth through property, one scenario put to us was to establish loc on ppor and draw 80k from this to use as deposit on 510k ip, with the idea of approaching different financial institution for balance of purchase price thus isolating ppor from risk of foreclosure etc. This sounded ok, we never went ahead with this suggestion and decided to do no further business with the institution, it was a fee of 5k to be customer for life type setup. However i have been thinking how we could claim the interest on the 80k deposit which is attached to our ppor, as we would be paying interest on it to the first financail institution. Question is; is the 80k tax deductible or do we just wear that expense in this situation which to me seems to be the way it would be.