Are we talking about SABs or a brick and mortar looking to reach out to a wider audience?
Even with SABs, the physical location is such an important part of ranking (especially on mobile devices) that you're unlikely to get in the 3-pack or high in the map results outside your actual area, unless you're way out in the boonies and don'd have much competition.
With that being the case, you've got two different kinds of search results you'll want to influence. The first is map/3-pack results where you can get them (your actual location in other words) and organic listings. For those organic listings, local landing pages can potentially get you ranking in places outside where you can reach with your local listing.
My two cents, if you're talking about a single location business, target all the locally relevant aspects of the site (NAP on every page, schema, H2 and title on home page, map, etc) around where you're most likely and most interested in ranking for, and then build your local landing pages to expand on that foundation.
Joy started a great thread back in March if you're looking for some real-world examples of making some of those extra city/suburb landing pages and getting them to work. There's a ton more threads on the topic too if you dig around a bit.