i have a rohn tower, (3) 20' sections. the largest sections is about 5' spread at the base. i forget the pipe diameter, 2" maybe, with 1.5" angle for the cross braces. specs in the catalog list it as about 500 pounds for the assembled section.
the top 2 sections have solid rod (1.25" i think) for the legs and solid rod cross braces. each of these is listed at around 500 pounds as well.
i suspect, in total, yours would weigh around 1500 pounds at most, like mine. not sure that 30" base is big enough to free stand w/ a 10' turbine?