Some advantages on buying a home are that the prices are usually more afordable, that the process is shorter when comparing to building a house, that there is room for negotiation, etc. But builing your own, also comes with its side of perks, for starters you will have it made to your especifications and particular needs, also there won´t be any buyers competition and it will have less maintenance issues. There are both pros and cons to each, but the decision at the end will come down to what is best for your unique situation.