DAF or Iveco 7.5T?

idrive:
Do you think a cheap truck could still cause many headaches on such light use?

Depends a fair bit on whether it is parked for those 5 days a week on concrete/tarmac or rough, damp ground. Also whether it really actually warms up in that 5 mile radius. Standing still disease affects any vehicle but the older it is the more often and the worse it will be.