what you have to put into perspective is the capital share you have to pay to buy into a group and the monthly fees aswell.
If you are planning on doing a cpl,just think about this.
Capital outlay for your share will probably be £6000. Thats probably about 55 hours time in a club aircraft,including fuel and no maintenance for you to worry about.
It may be better to spend the capital on the CPL and then spend money hour building when you need to.
If youve got the cash though get on and do it!