Start with the numbers, not the property
It is easy to fall for a place before you have run the figures. The disciplined investors we work with do it the other way around — they decide what the deal needs to look like, then go looking for a property that fits. Before you inspect anything, get clear on your borrowing capacity, the deposit and costs you can comfortably commit, and the rent the property would need to achieve to sit where you want it on cash flow.
Build in a buffer. Rates move, vacancies happen, and maintenance is rarely zero. A common rule of thumb is to stress-test the loan at a rate meaningfully higher than the one on offer, so a future change does not catch you out. Your broker can model this with you so the buffer reflects your actual position rather than a generic figure.
It also helps to be honest about your timeframe and your appetite for risk. An investment that works on paper at year one can feel very different if you need to sell in a hurry, or if a few months of vacancy land at the wrong time. Knowing how long you intend to hold, and how much of a shortfall you could absorb without stress, keeps your decisions grounded when the market gets noisy.