In reality there is no "correct financial structure" only one that best suits your own needs and property goals, including your budget considerations.
It's more important for property owners to consider the most "appropriate" legal structure for their property portfolio.
The structure refers to how the property is owned. Particular tax and asset or wealth protection issues will flow from the structure you have chosen (or chosen by default). For example, you can buy property:
a. In your own name solely;
b. Jointly, or as tenants-in-common with a partner, spouse, or with other third parties in a partnership;
c. In a company name - so the company owns the property;
d. In a trust structure, with single or multiple Trust beneficiaries. There are several types of Trust structures as well. A super fund is a Trust structure.
e. Indirectly, through purchasing shares in a separately managed property fund, be that a company or Trust structure managed by someone else. There are many public and private property funds that facilitate property investment using collective funds from many members.
So, depending on specific factors that apply to your own situation, factors like how many properties will you own, your borrowing ability, your familiarity and knowledge about trusts and companies, asset protection objectives and attitude to risk and tax situation today and in the future (this is not an exhaustive list) you can choose the most appropriate structure, generally after taking advice.
There is no one perfect structure, and anyone who pronounces such has either an interest not disclosed, or is simply not taking your own specific needs into account. The only way to know if its "correct" or not, for you, is to assess whether it meets all your needs, and has enough flexibility to continue to meet your needs in the future.
The question about how the bank treats your property in terms of security and cross-collateralisation, is a valid one, in terms of helping you to define your needs in this area, however it's a separate consideration to the legal ownership of the property, and the legal and tax considerations that flow from the structure.