Welcome to the forum! I'm new here too, and unfortunately not an expert. But I would say you'd have some better luck adding some details to the post.
I do know these bikes can do a decent total mileage, but 45,000 is quite a bit. You may be able to find something with lower miles if you look around.
How much does this one cost?
Does it run?
Is it complete?
You have a bit of an advantage if you go cafe, in terms of the cosmetic shape it's in, because you will probably be changing it so much (losing the side covers, new seat, tank etc).
Good luck.