Roof drain inspection and clea

Roof drain inspection and cleanup: I live in a house under a large pine tree that sheds a lot of needles at points in time. The foam roof has both flat and slightly sloping surfaces. I am 73 with ailing knees so going up and down a ladder to check the state of the drains is not fun and is becoming a bit dangerous for me. I have been thinking about a robot that I could put up on the roof either directly or by way of a lift. The robot would navigate around some pipes on the roof or even climb over one of the pipes. I plan to add a camera to the bot and at least one remote controlled arm for cleaning around the drain and possibly lift and clean the drain caps (currently wire baskets).