Will prices go down if there is a downturn? In modular flight training no, because there's quite a lot of competition for the premium FTOs from very small operators and from overseas and the margins are already small. For integrated training, which charges a premium price with higher margins but has a high barrier to entry, yes.
Integrated schools will once again try and move into the modular market to supplement their income. Some FTOs will go bust, particularly those in the US.
100,000 euros? I wouldn't. See advice from WWW, stay in employment and follow the modular route.