How can I get Wi-Fi all over my property?

I'm curious, how would one go about ensuring that Wi-Fi coverage extends throughout their entire property? Are there specific devices or technologies that are better suited for achieving this? Is it a matter of simply upgrading one's router, or are there other factors that come into play, such as the layout of the property and the materials used in its construction? Additionally, are there any cost-effective solutions available, or does achieving comprehensive Wi-Fi coverage necessarily come with a significant price tag? I'd appreciate any insights you can provide on this topic.