I am a bit late replying but might I suggest that before going for a Queen Elizabeth or Prince of Wales Airfix might try something a little smaller? One of the new OPV 2 class could be a good introductory model ,presumably it would be at a more affordable price, and not too large to store when made up. The Type 23 has been produced by several manufacturers and the Airfix Type 45 is a good model though there might be some mileage in an update pack. Now might also be a good time to start work on a Type 31. Some of the Hunt and Sandown class mine warefare vessels are still in the Fleet. Again much smaller, and cheaper, than a carrier, in both senses.