imo i would go with the MDP, i had this happen about 1 1/2 years ago to me on a job. I landed up going with a mdp in the basement and several panels though out the building. i would say cost can be slightly high or if you look at the fact of home run lengths slightly lower depending on your situation. Either way i feel this is a neater and much safer install for the homeowner. They are tought in an emergency go to the mdp and kill it one panel at a time then the main! Not the best of practices but it works rather then them running around a house trying to kill each little panel when they don't even know which one is causing the problem. i did mine this way and the inspector praised my design and install!!!