One thing to be careful of (not saying it is or isn't an issue) with new rules is regarding apartment - is it off the plan? If so, are there any issues with this? Is there a separate car park, as MK70 pointed out previously, this may need to be funded with cash,
Lastly, you say rent pays the loan off. Depending on admin / management costs, the rental income may be a fairly low %, which means the fund will need to chip in, especially if it is therefore negatively geared. You need to make sure there are enough contributions / cash coming in to cover this as trustee. My point is, even if the rent is covering most of the interest costs, your equity needs to be getting a return which on apartments, has been a bit hit and miss as far as capital gains have gone recently. Just a caution, in case you have been to a seminar recently and have received the 'secret to an iron clad, guaranteed solution to your future wealth and retirement dreams' (if you know what I mean).