If you want something inexpensive and easy, there are two general paths:

1. Self-hosted platform: A photography-focused system like Koken can be a low-cost option if you’re willing to handle hosting and setup yourself. This gives you more control, but it also means more responsibility for maintenance.

2. Hosted service: A service such as PhotoShelter can be easier because hosting and much of the setup are handled for you, so you can spend more time shooting and less time building a site.

If you’re already comfortable with WordPress, another practical option is to use a reasonably priced photography theme rather than a very expensive one. One community recommendation was the Keres theme, which offers strong gallery features at a lower price than many premium themes.

In short: choose self-hosted if minimizing cost matters most and you don’t mind setup, or choose a hosted photography service if convenience matters more.