I don't think very much at all.
I appreciate that for some candidates it would be difficult, but leadership candidates do a disclosure every month leading up to the final week. If it were just one disclosure that had to be prepared a week before election day through an Internet system, this is what the Internet is for. You would just upload a comma-delimited file, and it would appear on Election Canada's website. It would be illegal for it not to be accurate. Elections Canada wouldn't have to do any verifying. They're still verifying some returns from 2015 from the parties, so that verification takes a long time, but just putting it up so that people could search it is not difficult.