Hi Desk Pilot,
On the current pay scale (Assuming no rises) it will take you 6 years as an F/O where you will earn around £42500. At year 7 you will see the largest rise of about £5000 when you reach S/F/O. Thereafter the rises are about £1000 a year.
If cash is your main priority you would perhaps do a lot better with other airlines who enjoy higher starter rates combined with a much shorter pay scale. Ryanair, Easyjet, GO, BMI etc immediately spring to mind. BA's pay scale is 24 yrs as opposed an industry average of approx 15 yrs.
Please note however that there are very strong moves afoot within the Pilot community to improve the current pay situation at BA.
I note you state that you intend to pay for your training. If however you are able to start as a Cadet with BA then they will initially pay for your training but you are committed to paying a portion of it back out of your CEP starter rate of £23000. I think it is paid back at a rate of £250 a month, but I'm not sure for how long.
I wish you all the best with your endeavors.
Regards
Exeng