Save some money and stop wasting it.
So much for how to save money. £650,000,000 is what this pair will cost this year and don't forget the £320,000,000 spent on the computer system which was worse than a chocolate tea pot. Faults?
Now I am not a parent paying support. My son is 23 now and grew up with two full time parents. The CSA never did work and it would have been far, far cheaper just to pay the maintenance. The so called savings from the CMEC have never appeared and never will. Give it up, close it down and stop playing.