Why not?
Q1. Shed light on the groundschool set up - ask the people who run it - the school
Q2. Quality of tuition - ask them what qualifications and background their staff have. What are their success rates...
Q3. Hours of work - has to be answerable by the school
Q4. How much homework - ask the school what is needed on average as different students are going to do varying amounts
Q5. Where are they staying - schools produce lists of recommended accomodation
Even my kid could sort that out in 1 phone call!