I spent 20 seconds on the Tayside website and I will ask you to calculate that 26K again and try to put it on a list here.
I believe that there is something missing in that cost estimate.
If I were you I wouldn' t toss the job.
You can keep working and use your time off to fly.
Why would you do it full time when the biggest part of the training is lost at reading the ATPL books?
I worked 2 jobs, one full time, one part-time while doing my PPL and studying the ATPL books. 12 hours at the jobs, 4 hours of study, 2 hours on the commutes and 6 hours of sleep. No weekends, no parties, no friends.
It was tough but not impossible. Time went by like an express train.