Map Idea fields to Proxy Vote fields Merged

Each idea is automatically given a proxy vote, but the other fields don't carry over into those votes to be able to aggregate them. In my case, I want to track the value of the customer making the request through ARR. If multiple customers have the same request, we want to sum it up into a Total ARR - combining the the ARR on the Idea and all the Proxy Vote ARRs. If some one has entered in an Idea ARR, I'd like it to sync to the ARR field for that first proxy vote.