Tech support could not provide any information about the Giga-Blast speeds with their recommended hardware. You would have to go with a trial and error approach. However, they still want to charge for the trial and error effort.
If they could simply answer simple questions, then no trial and error is required if they could determine the frequency band of transmittal and popular wi-fi router performance capacities.
Cox over-promises and underdelivers but continues to increase your costs.
The problem seems to be awaiting a solution from Elon Musk--who underpromises, overdelivers and sets standards for customer service and company design quality and innovation.