Depends what you want dude, studying for 2 years or one.

Personally I am doing the B1 and B2 as you know fulltime, but I'd also consider doing an A license, can then get out and work on the line (£25k where we are), and gain experience, and then do the extra bits to add B1 (or B2) onto your A license in your spare time.

Well worth aiming for the B1/2 though, currently rates are about £35-40k for B1 and B2 is 40-45k.

Having a license is only half of the thing, experience is required too, hence the A license to get employed and then do the extra modules for the B1 or 2 would stand you in good stead