+1 that older sport/touring models are more amenable to fender installation.

OP, it will be tough to know 100% for sure whether the fenders will work in advance, but you should be able to get a fairly good idea. I agree that it looks like 35mm fenders will fit through the brakes, between the seatstays, and through the fork blades. Maybe 40 or even 45 will fit, but you should measure. Remember to measure the gap between the brake arms with the brake pads touching the rims. It also looks like you have plenty of space between the rear tire and the seat tube. If there is no hole for a bolt through the chainstay bridge, you can use a p-clamp around that bridge to attach the leading end of the rear fender. You won't have a ton of vertical clearance between tire and fender at the seatstay bridge, but it looks workable to me. Try to measure that gap and hope it is at least 10mm.