RAA is by far the cheapest option to learn to fly. If you wish to go further afterwards it is an easy conversion across to GA, whether it be for a PPL or higher.
Some GA schools don't accept the hours however legally they count so don't be put off by that, quite often it's a financial hunger. Given a good instructor, RAA training is as good if not better than GA. An aeroplane is an aeroplane after all.
Shop around and ask around. An experienced and dedicated instructor is worth gold.