I'm assuming I'll have to pay the £2000 to receive any books then, sucks
ABSOLUTELY NOT!
you can buy the books readily and cheaply on ebay
(other internet auction sites are available) or ask on here or over on the Flyer forum and someone might be prepared to donate/sell theirs. You can then study them at home at your leisure.
Do a search on here and you'll find plenty of advice about paying for lessons up front, most of which advises against it, my own included.
Instead of taking the bar job, see if you can find a position at an airfield where your learning curve will be accellerated.
(I see that it took me 5 minutes to type my response......!)