I honestly don’t get the attraction of co-working spaces for most digital nomads. The costs often outweigh simply working from a cafe or the balcony of your AirBnB – 3G internet is cheap in most of the world now. In my hometown, co-working spaces attract locals who set up small teams with other local freelancers and could benefit from in-person collaboration. But for a solitary digital nomad all of whose contacts are remote, what's the point?
There are some extra perks to a good co-working space, though. It is library-quiet, and you are surrounded by people who are living and working a similar plan. I was actually able to informally recruit a guy who often worked near me, when we needed to bang out a bunch of UI components and their services, for a design that the client and I had already detailed fairly well.
Because there are two of us, we're being conscious of not spending every waking moment together. A coworking space helps with that.
We're planning on staying places for 3 months at a time. Here in CDMX, that's let us get a coworking space, gym membership, and a semblance of a routine.
We're planning on spending extended time in our hometowns, too (though maybe not 3 months).
If you and your SO are a developers, then I would highly recommend a work-cation in Prague. I spent a few weeks at a really cool co-working space, PaperHub, which was part of the Institute of Cryptanarchy (lol). They take BTC for everything, the transit system is a dream, and there are tiny little specialist grocery stores everywhere. If I was ever going to return to the same place twice, it would be Prague.
Beware of burnout, though - there is no rest in this lifestyle. The home office wants me online during their business day, and constantly learning new cultures is a huge cognitive load. After two years of this, I needed to settle down for a while; right now I am resting between jobs, thanks to a very supportive mother. Oh, make sure to take good care of your parents, they may end up being the only solid, reliable people in your life.