Just bought a drone for my 10 year old, it can travel 100 mtr in any direction and is video eqt (HD), 12 minuets flying time, it could be great for showing potential customers how bad their gutters are, any other sensible ideas, Ps it cost £150 and can record
if you want to buy off the shelf i got from hameleys toy store in London, but can get them on amazon, unless you work for nassa, then build your own.