The other option is to TT on your road bike - it's the future, apparently 🙂
In all seriousness, if you're just TTing for your own entertainment, doing it on a road bike is as good as anything unless equipment optimisation is the part of it you enjoy most. If you're doing CTT time trials for anything other than your own entertainment, you need a psychiatrist, not a bike fitter.
The other option is to TT on your road bike - it's the future, apparently 🙂
In all seriousness, if you're just TTing for your own entertainment, doing it on a road bike is as good as anything unless equipment optimisation is the part of it you enjoy most. If you're doing CTT time trials for anything other than your own entertainment, you need a psychiatrist, not a bike fitter.