To be honest, there's no clear answer to choosing between wood or metal framing. You can choose a wood-framed home if you're more comfortable with traditional materials and want to save cost on insulating the home. Wood also provides better aesthetic value and makes homes easier to sell when compared to metal buildings. Most builders are used to wood, so you can readily find one for your project.
On the other hand, metal can be a superior choice if you value minimized preparation work and support benefits provided by its durability. Metal homes are more environment-friendly when they are built with steel frames. You can also benefit from the advantage of low maintenance if you're looking to build a new property that won't be used frequently.