Uuummmmmm?
Obviously the CF is the most popular route and I think that your chances of getting a 2 week posting would be better. Speaking of my own experiences , there would be Albergues offering positions , especially private ones without having attended a course.
On one occasion I met a young lady in a town in Rioja , at a fair sized albergue. She was a volunteer who had a private spot to stay and was probably remunerated with a few Euros per day which she supplemented by selling the odd bottle of vino. She seemed happy enough.
Unless it is a Hosvol albergue , most people move on eventually feeling that they were taken advantage of ........ but not most Spanish folks who enjoy the change of scenery , the paid for pack of ciggies , a full belly , a warm bed and the opportunity of experiencing self worth again , don't complain.
In 2003 there was a hospitalero at Tomas' albergue who had just spent 2 weeks in Puente la Reina , he was just so happy to have a posting where he could depend on his next evening meal with a glass or two of vino.
In conclusion , I was soooooooo fortunate to give back as a Hospitalero at San Anton ............... you should however know the ground rules , the law and be wise to any chancers , the rest of your pilgrims are YOUR responsibility.