Poulw has a good guitar stand how-to on Instructables – “A simple and cheap stand for one or more guitars. Takes maybe two hours to build. The Mod is based on imarunner2’s pvc bike rack. This is a 4 guitar version. I bought two 10 foot 3/4 inch pvc pipes and had them cut in half at the store. 11 3/4 “T” connectors 6 elbows 5 caps 2 sections of self adhesive insulating pipe foam. Total cost was less than 30 dollars. Similiarly manufactered items go for $50 to $100 in music shops.” Link.
DIY PVC multiple guitar stand