Set Sonarr to prefer SD over HD, but not to redownload?

Trying to minimize my downloads, not terribly concerned about quality.

Is there a way to set the delay and profiles to do the following:

Wait 30 minutes (set by delay, that seems obvious), if both SD and HD exist, download SD.
If SD doesn’t exist, download HD, but stop checking for any more postings)

Set the cutoff to HDTV, put SDTV above HDTV in the profile (advanced settings shown) and like you said set the 30 minute delay.

Thanks very much.