CDL requirements

If you do any hauling for profit (i.e. getting paid) it is commercial. Doesn't matter if you are hauling loads to Best Buy, or using it to pull your yard tractors for the business you own. Even pulling a race car to the track can be commercial, if there is prizes involved.
What will you be doing specifically?

I'll assume you are, in fact, commercial as that is more likely....

Class A commercial driver's license is required to operate any combination of vehicles with a gross combination weight rating (GCWR) of 26,001 lbs. or more, to include a towed vehicle that is HEAVIER than 10,000 lbs.

Class B commercial driver license is required to operate:

• A single vehicle with a GVWR of 26,001 lbs. or heavier.
  AND/OR
• Any vehicle as described above that is towing another vehicle weighing UP TO 10,000 lbs.

Is the trailer 25,000 GVWR, or is the truck and trailer a 25,000 GCVWR? (combined)

 

In that case, as you are commercial you will need a class A, as you will both be over 26,000 lbs and hauling a trailer over 10,000 lbs.

Here is a flowchart that shows that...

 

Check with your states requirement. In the state of Ohio you could run with a class c. With your distance traveled you would not even a log book. You would not need to file for IFTA. Some hoops not needed. You will need to pass DOT Physical, carry insurance among other things. Good luck.