Preguntas para una entrevista

[laepelba]

In this exercise, for each problem, several words are given (out of order), and it was my task to put the words in order, with the correct conjugation, spelling, punctuation, etc. to form a question for an interview of a famous singer. There are a couple about which I have some questions:

Example #1:
Words given: su / será / próximo / concierto / dónde / su
The answer in the answer key: ¿Dónde será su próximo concierto?
My questions:
- Why is it "ser" and not "estar"? I thought that with location, it was always supposed to be "estar".....
- Does "próximo" have to go before "concierto"? I had it after.....

Example #2:
Words given: vacaciones / serán / cuándo / próximas / sus
The answer in the answer key: ¿Cuándo serán sus próximas vacaciones?
My question:
- ...is the same as in the previous example! I had the "próximas" after the "vacaciones". Ugh! I feel like I'm never going to understand when/where/how to place adjectives/modifiers........ (sigh.........)