I already have an iPad and have used it as a hot-spot for my phone sometimes, when abroad. I don't need it for my phone anymore because I've got EU-wide minutes and data on it now. But I was thinking of buying a Mac Mini recently, I could take it with me abroad and could use the iPad as a display (with Luna Display).
So I was wondering if it would be okay to use the iPad (which would serve as a screen) as a router, or if it would be better to get one of those 4G wifi routers.