The larger estimate near two thousand dollars included additional upgrades beyond the office coverage. Those upgrades are real and have value. They strengthen the network backbone and prepare the whole system for faster 2.5Gb performance in the future.
That said, you do not need all of them to solve the problem in front of you right now. If the priority is video call stability in the office, the most direct fix is the dedicated office access point. It targets the exact pain point you are feeling, at a fraction of the larger scope.
Our recommendation:
start with the office access point. If you want the broader backbone upgrades later, we can phase them in whenever it makes sense for you.