Mine, under construction. 2x6 treated frame with 4'x16' cattle panel. Needs 1/2" hardware cloth over entire frame. Not hard at all to build, just basic tools. Lots of Youtube videos on how to build them.
If you go to this site: https://www.4wvland.com and check the listings they show the HOA rules for the property (see the tab marked DOCs). Common restrictions are: minimum square footage of a structure, no mobile homes, limited use of campers on the lot, no discharge of firearms, etc.
You have friends, family and colleagues that you personally know that have been banned or blocked from MDS?
Heck I don't think I've personally met more than 2 members here.
Look at the 4473 questions. https://www.atf.gov/firearms/docs/4473-part-1-firearms-transaction-record-over-counter-atf-form-53009/download
I can tell you that if he's been denied and tries to apply again and changes his answers that will be a problem.
I suggest he talk with an attorney about...