Welcome
I would not keep a baby hog in anything remotely that big. A 6qt rack system works well for baby hogs. If the hog you purchase is a sub-adult you could probably make that work just fine for most of her life. I personally use larger totes, but many use the common bus totes for females.
If a rack system is not viable, a 10g tank with an undertank heater works well. They key to smaller hogs is security. The bigger and more open the less secure they will feel which could cause them to feed poorly.
GL!