OK, sure electricity for heaters on a normal day rate is expensive compared to say using gas energy, but electric heating does have it proper place in many homes. However if an unsuitable heater, or heaters, are installed in the wrong place then annual running costs can be very expensive and/or the results for warmth may not as expected.
As an example, in my experience the heating systems that stand out most that have surprised tenants in rented homes are systems that have “wet” electric radiators where the circulated water is heated by electric energy on normal day rate prices. These systems look the part when viewing a home to rent but when the winter energy bills come in then tenants begin to look at their exit clauses. For these systems even the Energy companies can underestimate what monthly direct debits needed which makes the situation even worse still for tenants. On a lessor scale I have seen: large wall heaters plugged into normal power ring sockets which overload the circuit, and internet connected “smart” wall heaters that are connected to an off peak electricity supply only which means they can only be controlled from a smart phone between midnight and 7am! For an all electric energy home there is even a risk of overloading the electricity supply into the house!
To avoid wasting money and causing inconvenience I suggest that if a homeowner is looking for a new or replacement heating solution then ask a suitably experienced independent electrician for advise, to either choose the heaters or at least suggest options for heaters that would be suitable. Most of the likely heaters a home needs can be sourced by tradesman direct from normal electrical wholesalers at very good prices. Note that if a complete electric home heating solution is required then some heating manufacturers will offer a design service free of charge to electrician installers.