I guess it's mechanical. In the auto field. Specifically the shocks/springs or whatever. Info on how to lower a vehicle by 3 inches or so, specifications for certain makes and models, etc. Pricing, too. Follow me or PM if you already have me followed pleaseeeee ?
Just ring your local suspension shop, they're helpful with pricing and whether you can achieve it on the given vehicle. Biggest problem with lowering is cutting away parts of the body and remaking them to fit the wheels in the arches.