The property type has to be considered in terms of the tenants you can attract and the length of their tenancy. Before you become a landlord, get your attitude focused on the investment being a business.
While you’ll expect some capital growth from your asset, in the first place you want the property to generate rental income at a level and consistency that meets your goals. The rent may not cover your loan costs and other expenses, in which case you are negatively geared.
However, even when you are negatively geared, you don’t want the shortfall between rental income and your costs to be too large, because you must fund the shortfall from other sources.
To achieve planned rental income, you must ensure two elements: the property type and location meet demand from potential tenants, and the property is of sufficient quality to meet your target rent.
Regarding location, think about buying properties with features:

The property type has to be considered for the tenants you can attract and the length of their tenancy. Students are typically looking for shorter leases than families, for instance, so if you want long-term tenants, steer clear of property types rented by students.
To elaborate further:

The property’s quality and features are important indicators of the rents you can charge, and are a good guide to where you should spend money renovating. Always budget your renovations, but here are some improvements to focus on: