> Is there any evidence that the deployment of the nepalese soldiers had any ill effects at home?

https://en.m.wikipedia.org/wiki/Opportunity_cost

Take their travel expenses and peacekeeping salaries and repurpose those as a practical domestic training program or foreign aid.

I only propose this as an alternative to the status quo, which apparently features useful practical lessons about sanitation, but only through trial and error in someone else's backyard.