An arc needs to be looked after well if it is to last for years to come. Something as huge of an investment as this unit will mean that you will need to devote a lot of money and effort in ensuring that it will be in its best running condition always.
It is certainly not going to be immune to damages and breakdowns. You might even need to get some of its parts repaired and replaced over the years. The key is to make sure that you will have a reliable car servicing provider that you can refer to every time such a need comes up.