WiFi points are pretty ubiquitous these days, especially if you’re in a populated location, but if you absolutely rely on an internet connection to carry out your business, a data plan is a good investment. There are two ways to tackle this – firstly, you can choose to pick up a tablet with a dedicated SIM-card slot. Be aware that these tend to be more expensive than those without: for example, there’s a $150 difference between the WiFi iPad Pro model and the cellular model.
A cheaper way to tackle the problem is to tether your mobile to your tablet, and use your existing data plan. There’s a few caveats to this – you’ll always need to have your phone with you, and you’ll be using up your phone’s data allowance – but for those that need to connect to the internet without WiFi sporadically, it can be a smart move.