If you are thinking of going gas, you also need to consider the cost of fitting any extra gas piping, and getting it fitted by a competent gas engineer. Then divide this cost by the length of the time you will be living there. However, you also need to consider this is an upfront cost.
Any servicing, repair and maintenance should also be factored in. If you buy any imported gas appliances, you can also add a the lead time for spares to any inconvenience factor.
By contrast, once the electric ones are fitted they are usually maintenance free. And any competent worker can fit them.