Well yes, it is unlikely that you would find someone who can use Webflow, but you still have two options:
to ask a designer on Reddit if they could look into Webflow and they might look into how easy it is to use;
or simply find a designer with a professional, impressive portfolio who is within your budget - I don't see a reason they have to use Webflow, they can still build beautiful, responsive websites without it.
Considering the small number of active users currently in the Webflow forums, it is unlikely you will find a designer here (but not impossible).
Come back in a few months, however, and I'm sure there will be a much larger, active community with several users willing to make a Webflow site for you.