Every city in the world has the potential to support indie "city guide" online businesses. Basically a wordpress site with articles about new restaurants, bars and things to do. Over time, these become money-making engines.
Build up enough SEO authority and sooner or later companies will want you to write about them as you now own the distribution channel for local services. Which you'll happily do... for a fee.
If I was a young entrepreneur in an up-and-coming city, I'd start one of these sites and just crank out content as often as possible. Then a few years later, turn it into a business.
I've seen this happen in every city I've lived in. Founders making a very nice living from it. It's one of those no-brainer evergreen business types that just takes a lot of time to build up and capitalise on.
You hear "you need a moat" in the startup world. If you're not technical enough to create a tech IP moat, probably one of the next strongest moats is years and years of built up SEO authority. Competitors can't just jump in and tackle you head on.
