Looks like enough room to me as well. Zip tie the fender to the chainstays.
Rant: It seems that 99% of modern mass production bike manufacturers have given absolutely no thought to the use of fenders on their bikes. And it's not like there is a long list of expensive accommodations that need to be made to allow fenders: dropout eyelets, brake clearance, and a chainstay bridge. That's it.
And all of the changes that have been made to the modern road bike that have eliminated these three elements have not made the bike ONE SINGLE BIT BETTER. No improvement. Nothing. Nada. Zilch.
I was fixing a neighborhood kid's cheap bmx bike this weekend and instead of a chainstay bridge there was a plate behind bottom bracket that served as a kickstand mount AND had a tab with hole for easily attaching a fender to. How can the makers of $60 crap bikes afford to have these features??!!!
Is fender mounting technology being kept secret from makers of high end bikes? Too late, I've seen that exact same chainstay plate with fender tab on a $3,000 A.Homer Hilsen. That Grant Peterson must have the best industrial spies.