Sorry to come over all "sceptical", but did you try another career, or purposefully have a "career break" ? the job market hasn't been rosy for a long time, but could you really not find some position on the 737 within the last 5 years with 1000hr on type ?
Don't know where you find a figure of 55k€ from, you could go to Ryanair & do the full TR over again for 30K€ with (at least) a permanent contract at the end . . similar or less would get you a TR & job on the Bus with Wizzair. Just curious why this "problem" is now so important after seemingly lying fallow for 5 years. . . the length of time you have waited has made your situation far worse, it would have been better to have pursued it aggressively & taken anything you could get your hands on 4 years ago.