The care sheet really does cover the essentials, but. . .

-a container to house your frog, most commonly a terrarium.
-dirt for it to burrow, coconut coir is very commonly used.
-heat lamp to keep it at proper temps.
-a means to keep up the humidity, either spray bottle, fogger, or mister.
-accurate gauges to monitor both the heat and humidity.
-water bowl, because they occasionally want to soak.
-decor to make them feel safe
-water treatment, or source of spring water, can't use straight tap or distilled, both are bad for the frog.
-food source, they eat a lot.
-calcium and vitamin powder, which needs to be added to the food source per the care sheet recommendations.

Can anyone else think of anything I missed?

As for owning them, they are great, and don't take a whole lot of time. They do funny things and make interesting expressions, at least as much as a frog can. Most of the time they just sit in one spot, so they are particularly exciting. If you do end up with a male though he may 'talk' to you on a regular basis.