First, it depends on what kind of business you have what you how you need to use the internet. Of course, it is more convenient to use Wi-Fi, but at the same time I worked in a call center and the internet was necessary for the company's activation. Now I work from home and I prefer Wi-Fi, but again, it depends on the situation. And also it depends on what you use for having fast internet. For example, recently I bought a
new OpenWRT Router, and it is awesome. There are so many advantages you can get using such a router, I think in case you don't, it would be good for you to search for some information.