IMHO 35 is getting a little on the late side. You may suceed - certainly people have from that age, but you're more likely to waste a lot of time, money and effort.
Analyse your motivation in wishing to be a commercial pilot.
If its financial, forget it, you'll be unlikely to earn enough extra to cover the costs of training and lost income during training.
If its because you think really want to fly, how do you know unless you've done it, but by then its too late. You'd be better off sticking with your current career path and doing a bit of pleasure flying when you want, rather than turning your entire existance upside down.
Do you want the challenge? There many other ways that are a lot less financially risky.
CPB