I stay in hostals, but eat very simply and drink less than others. Even the standard Menu Peregrino, or Menu del Dia is too large for me to consume.
So, my average runs close to €53 daily. Most of this, about €43 on average goes to overnight housing. I value my personal privacy and comfort above most other things so I can be rested the next day.
I find that my financial model has run true for my past four Caminos. As I am generally on Camino for three to five weeks at a go, the average is reasonable.
Some stretches have less expensive lodging, and I will stay in a private room at a private albergue if I can book one ahead. I snore and must use the facilities several times each night, so this is out of consideration for others.
Other stretches of Camino, most notably cities and towns that also attract tourists, cost more for a room. So, while paying €60 for a room might seem excessive, if it is in Pamplona, Logrono, Burgos, Leon, Astorga, Ponferrada, or even Sarria, it makes sound sense to me. The average is retained at less expensive places found on most other nights.
Just as an FYI, I use
www.booking.com almost exclusively. It has always worked very well for me.
I hope this helps.