No it doesn't matter. If all of your equipment is in a room that does not have DA, pick the closest DA room and build your equipment there.

If you have distributed video, as well, put the TV's and any local sources that are part of your Crestron system in the appropriate rooms. This is mainly for ease of programming and remembering where each TV is in programming vew.

You can build everything in one room but it opens you up to making mistakes in programming.