Just add the TV, then in thirty days, scale back. If you are wanting the more HD, plus more sports, stick with TV on U-Verse.
As for the "Mandatory" CATV, can you talk to the HOA and see if they will waive it for the pure fact, that you have a competitor. If not, then look at the budge for the next thirty to sixty days, and see where you can cut back to even out, until you change the plan to no tv on U-Verse.