There is no realistic or un-realistic amounts to consolidate, I think the main questions should be, Is it the right choice for you? Have you considered all the options available to you? or even Are you aware of all the options available? Many people are under the impression consolidation is the only way forward and for some people it's the perfect option for others a DMP or IVA may be better. Why not call DAT on 0800 954 6518 and make sure you have considered everything, the advisers there will be able to give you the solution best for your personal circumstance