Here is a cool 37ft inflatable antenna tower mast that can support a 8lb antenna I do not know how you could use a I max with it. They also make a 37ft version that supports a 28lb antenna & they also make a 60ft one
YouTube - Portable Inflatable Antenna and Sensor Tower for Emergency Management, Security, & Research
YouTube - Portable Inflatable Antenna and Sensor Tower for Emergency Management, Security, & Research