Re: How much money?
>How much rental can I charge for installing one on our roof?
About 0.00001% of the cost of getting planning permission, getting the CAA, OfCom, the CoE, the village in bloom committee and the Chancellor of the Dutchy of Arbroath's gamekeepers tea-masher's mate to approve it.
Getting a structural engineering report, a new telecom certified electrical supply, a separate meter because the 50W it uses is taxed at a different rate (actually the same % but calculated in a different way) and a determination if this means your cat now comes under IR35
You also need a copy of the report about how the government is dynamically thrusting toward a new next-generation cloud based high-tech utopia of skills based on Internet of things (only available from HMSO in person)