I would be interested to know how you intend to assess the quality of these schools' training. What criteria are you using? Who will judge how those criteria are met? What objective observers can you field that will visit each and every one of these schools and rate them against your chosen criteria? What specialist knowledge of the business of flight training can you utilise to lend your study credibilty?
Without such objective, knowledgeable comparison, your dissertation will simply be a list of the schools and the facilities they claim to offer. Using the opinions of students that have attended the schools is subjective and intrinsically inaccurate, unless your chosen contributors have attended a significant proportion of the schools you mention. Unlikely, I think!
Scroggs