Alpha Male,
Nobody can predict if a 35 year old will be attractive to an airline 10 years from now. I don't know if AlexL waited 10 years, or even more, but had he found a way to train at your age, he would have earned a great deal of money as a pilot by now. Delays in getting your fATPL have a lost opportunity cost that should be weighed in the balance. On the other hand, many people fund their training either with home equity loans or by cashing out home equity. It's a tough decision and the best route is probably somewhere in the middle, between the lowest cost and most risk averse route (waiting 5-10 years until you've saved all the cash needed) and the highest cost route with largest risk (integrated with a large loan).
I remember seeing a post a while back by someone who spent £69K and took four years to gain his fATPL by Modular training. That is not a typical Modular budget by any means, but even the most expensive Integrated course would have been less than that if started four years ago. More important than what he spent the slower pay as you go way, is the fact that he could have been in an airline job sooner and probably for two thirds the price if he had sorted the money first and trained Modular full time. The difficulty with pay as you go while working is that you can't usually avail yourself of lower prices in the US. Even if sorting the funds first and training full time Modular had required a £20-25K loan, it might still weigh up better by getting one to the job sooner. The same argument might even justify full time ground school in six months over 9-12 months for distance learning. Good luck with your decision.