FWIW ... I've 'partnered' with a tool company, trying to develop a practical vacuum specific to this task. That is, to suck lines through and to blow lines through ... NOT for cleaning up the job site. The tool will be corded, and intended for nothing larger than 1" pipe.
The hard part, as you might guess, is getting access to the pipes. Once the wall is closed in, that mud ring is not your friend.
Meanwhile, the capabilities of the modest bucket-topper vacuum continue to impress. I've found it will fit in a 3-1/2 gallon bucket, like the ones used by the tile guys. There's still room to store your hose, etc., in the pail.
