Ford FT300 to 3.5t load? ASSISTANCE!!!

Dear community I need your help. We are about to get a “Ford FT 300 M TDCi Trend” used but in good condition by a known and trusted dealer. Because we know that the car is good in shot we want to get that from this dealer rather than a FT350 from a foreign dealer. The car has according to papers a permissible total weight of 3000kg. Empty weight is 1850-2161kg. Since we are 1-2 times a week and 2 times a year more than 14days e will be fully loaded* and will be on the road with complete musician’s cutlery, we come easily over the 3000kg. *fully loaded means: 6-9 people + luggage, 1-2 guitar boxes, bass box, drums+hardware, guitar/bass amplifier. Effectboards, small parts. I have already inquired about the (unfortunately unfriendly) Ford dealer around the corner and found out what I was afraid. That “Ford FT 300 M TDCi Trend” is from the official side not intended for a load. Sure, with Neuw but now that I think that the FT 300 certainly has no other chassis than the FT350 (3.5t maximum permissible weight) I think that there is maximum need for repairing the tyres and suspension, or do I overlook something? What do you think, to whom can I turn to to find out if it is feasible to charge the car and can you tell me roughly what that comes to us about? Thank you so much. Ben-John