What is extremely important is who was the builder. I would find out what yard actually constructed the boat.
7500 liters represents approximately 1900 gallons of fuel based on her 2700 nautical mile range and assuming there's approximately a 10 to 15% reserve you're achieving about 1.6 nautical miles per gallon at cruise. That is a little lean for a medium size passage maker. That being said their estimated cruising speed of eight knots if backed down to 7 - 6 1/2 would more than extend the nautical miles per gallon .
That being said if you can afford it – it’s not a deal breaker.
I may be wrong but I worked out it's approximately 22 -25 litres per hour @ 8 knots? 7500 ÷22 = 340.9 × 8 =2727.