LEGO Star Wars The Last Jedi: First public price list for planned sets

It will therefore be necessary to pay at least 784.99 € to afford all of these boxes, admitting that you do not plan to be patient and wait for the inevitable price reductions that will take place at amazon and others.

By way of comparison, you had to pay 667.93 € in 2015 to afford the first wave of 7 boxes based on the film. Star Wars: The Force Awakens then € 508.86 to afford the six Buildable Figures and the next 8 sets. 

Concerning Rogue One: A Star Wars Story, you had to pay 431.92 € in 2016 to add to your collection the first wave of 5 sets and 3 Buildable Figures based on the film then € 286.99 in 2017 to afford the following 8 boxes and 3 Buildable Figures.

(seen on Star Wars Collector)