It would be quite easy. As you mentioned, the wind speed is roughly 300 km/hour, in the clouds, where Venus is the most hospitable. The same article mentions that oscillations of the atmosphere happen every 4.8 Earth days. Hot air balloons move at about the same speed as the wind around them. Thus, a hot air balloon should be able to circumnavigate Venus in 8 Earth days, no problem.
There would be some architectural challenges, but the key question is, what is the turbulence like. In fact, there has been a balloon flight which, according to Wikipedia:
Designed to fly in the trans-oceanic jet streams, the Pacific Flyer
recorded the fastest ground speed for a manned balloon at 245 mph (394
The atmosphere at that level will have a similar pressure to Earth's, but there will be sulfuric acid all around, and the heat would be too hot for traditional hot air balloons. I would recommend using some sort of a helium type balloon, but it could be possible.
This was done once unmanned, by the Russians. Wikipedia quotes the performance as:
In 1985, the Soviet Union took advantage of the opportunity to combine
missions to Venus and Comet Halley, which passed through the inner
Solar System that year. En route to Halley, on 11 and 15 June 1985,
the two spacecraft of the Vega program each dropped a Venera-style
probe (of which Vega 1's partially failed) and released a
balloon-supported aerobot into the upper atmosphere. The balloons
achieved an equilibrium altitude of around 53 km, where pressure and
temperature are comparable to those at Earth's surface. They remained
operational for around 46 hours, and discovered the Venusian
atmosphere was more turbulent than previously believed, and subject to
high winds and powerful convection cells.