Very much comparing apples to oranges here....what's your budget Southport? Considering I have no dog in the race, I can give you some honest pointers.
we would like a pool in the 15x30 size range. The inground would cause additional cost such as the water table, rock, fencing, and decking costs. With the avove ground, we basically only have to worry about the decking. We would probably install some type of drainage system too either way. No way to get an inground for $30,000.