In Lubbock, We try to get volunteers to build a single stage and usually it fills up. then we have a google sheet that is sent out to all the builders to show what props are available. the builders pick what they want on a first come first serve basis. There is also a spot for stage start description and stage briefing. That way the MD has all the correct info for practiscore. We have 4 different stage builders and a classifier for this weekends match.
There have been certain months where I have designed more than one but then I find someone to set the stage while I build my own, then I will go trouble shoot it because I know what angles I saw on sketchup that may be of concern.
The biggest thing I try to promote is the value and enjoyment of designing a stage that top shooters enjoy. You might look to taking a few under your wing and teaching them the ins and outs of stage design. That would build their confidence and ultimately take some pressure off you to build and design all the stages.
Just my two cents