Only the non-televised games will have video feed online. Radio feed will always work.
The quality of the feed varies. See a game thread from an exhibition game for back-and-forth about this.
If you're cutting cable, you should stick be able to get broadcast (in this case, only CBS matters) on your tv through the wall. You should find a nice friend who has a WatchESPN-affiliated cable provider and use their WatchESPN account to stream all of the ESPN content. Offering to pay part of their cable bill might be helpful