Here is push up and collapsable square tubing , one square tube fits inside the other. Use as a Tv antenna tower with guy wires.
http://www.alliedtube.com/sign-suppo...par-square.asp ,
http://www.alliedtube.com/pdf/Uni_Telespar.pdf . And with a little creative thinking , make a swing hinge mount and base plate , so that when sections are all collapsed down it can be laid over and do the antenna mounting while standing flat footed on the ground.