Have you ever thought about buying a chest or upright freezer or a second refrigerator/freezer? Although your fridge/freezer might be sufficient for you if you are a single person, extra space can make a big difference in the long term. You can check online for a more portable coolroom to hire in Perth.
You can buy bulk food and then divide it into smaller meals by adding freezer space. You can then cut it into steaks yourself, which is much cheaper than purchasing the same amount of filet mignon steaks from your local meat market or grocery.
You can also use additional freezer space to freeze your new items on aluminum sheet pans. This will allow you to make your own IQF foods (individually quick frozen).
After the IQF items have been frozen, they can be packed for long-term storage. Individual portions can then be taken out and used when needed.
Just keep in mind that a chest freezer will typically be more economical to run than an upright model or a refrigerator/freezer, but may take up more floor space.
The manual defrosting freezer will provide better protection against freezer burn and will be more cost-effective than the frost-free model. However, it will require annual maintenance (i.e. manual defrosting).
A chest freezer is more difficult to access and organize than an upright freezer. Newer models with higher energy stars will run more efficiently than older models. It might be time for your parents to get rid of the old, hand-me-down refrigerator or freezer that you have in your basement.