You're not alone! I'm 35 and I'm going to quit my nasty job and do my atpls at home full time just as soon as I get my bonus!!
I did lots and lots of research on this. I originally wanted helicopters, and apparently there is much less age discrimination in that industry but the problem is with the North Sea winding down there's far fewer jobs. I therefore decided on fixed wing, and the reseach I've done indicates although big jets may be unrealistic, smaller regional turboprop operators can be disposed to look favourably on the older folk as they are less likely to be desparate to fly big airbuses and the like. This suits me fine, though make sure you're happy about what you're likely to earn. More hand-flying, less time away from home - perfect!
If you don't have it already I strongly recommend the Clive Hughes book
http://www.flightstore.co.uk/the_gui...0.item_id.369/