4G/5G Modem for Small Business

Hi r/networking,

I'm in Australia, in a part where we can get 4g/5g networks but the NBN hasn't arrived yet. We're in a temporary move for a renovation, and to put things short, the wired Modem isn't going to come with us.

We're looking for a 4g/5g Modem for wired internet. The most important thing is quick/easy setup and reliability - we can afford to break the bank a little. This is for a semi-retail business with 10-20 computers on the wired network. We've got wireless covered - we just need a wired solution.

Any recommendations on modems, or just what qualities/buzzwords to look for? We're currently looking at Simcard Modems, but we're not picky.

Edit: One more thing. We only have one day to buy this and set it up (not my choice, I only got this task about an hour ago). So something we can't pick up in a store is probably gonna be too slow to get.