LD1Racing, I can't answer for GtE, however I would add that whether landings are charged in addition to the cost of the lesson does not necessarily relate to the size /type of airfield, in my experience. Some schools have arrangements with the airport where landings are included.
Also, whilst your outlook makes sense be careful not to use an airfield that is too busy with commercial traffic as this may well push costs and frustration levels higher than you anticipate through getting continually held at significant cost and inconvenience to training.
BB