You are more likely to just need a fence with barbed wire and not active security guards. Theft of panels from utility scale solar installations is unlikely to

You are more likely to just need a fence with barbed wire and not active security guards. Theft of panels from utility scale solar installations is unlikely to impact cost much at all. Vegetation growth is a modest issue. Fortunately, the panels shade much of the ground, which reduces vegetation growth under the panels. Yes, you may need to mow every now and then, but the panels absorb most of the sun, which means the grass under them doesn't grow as much. As far as trees and bushes go, most solar installation are placed in open areas that either naturally don't have trees or have already been cleared of trees. People are mostly installing on converted empty lots or old agricultural land. Plus, if you cut down trees, you can always "offset" by planting new trees elsewhere. Ongoing maintenance on the panels is pretty low. Assuming you install in a place that receives rain every now and then, you may not even need to clean the panels of dust. Mother nature can sometimes clean the dust off on its own.