Which drivers are not covered by the professional driver qualification

For a well-known person who is not familiar with the Internet, I would like to clarify this question: Which drivers do not fall under the professional driver qualification.!? It is about the fact that only 4 thousand euros are available, the CE bill comes to it on an estimate of 3400 to 3800 euros,plus minus.The accelerated BKrFQG is also again about 3 thousand euros.Since everything is privately financed, the rest amount is not available,and therefore the question is whether there are areas where these qualifications A As for example: milk transports. concrete mixers. container transport. gravel sand transports with open trough. etc.