Help needed for trailer spec for moving hay bales please

[lostmymarbles]

I am considering purchasing a flat bed type trailer to move large rectangular bales of hay/straw on. Would really only need to move one at a time, but I have no idea of what sort of specification trailer would be needed for the job, would a double axle be necessary or would a single do?

Any advice to a complete numpty would be gratefully received. Thank you.

 

[pec]

If you're really only going to move 1 at a time I would reckon on round about 600kg for the weight of a large bale. Hope this helps