Central heating

You have absolutely nothing to worry about. We are on Camposol and have central heating and hot water which is supplied by an oil storage tank. It is very efficient and provides more than enough heat for us. We have gas central heating in the UK and I would swap it in a heartbeat for oil, because you know exactly where you are with bills ( you simply read the dial) on the oil tank and have it topped up when you want. 

Thank you. Cost wise is it very expensive to have installed?

I honestly dont know the cost in Spain, but I do in the UK as I am an installer. I would suggest it would be worth asking The Residents Association that is active in Camposol because they have lots of contacts and can steer you in the right direction.