I get to put a starter on a 2007 ford e350 super duty passenger van with the 5.4 v8 should be educational for me i have never had to work on this van .
One of the easier "plug and play" fixes that you can do. This should be 2 main mounting bolts, and 2-3 wires. Make sure you unhook the battery first....i'm thinking less than an hour total. Good Luck.
So your diagnostics was spot on. Good troubleshooting. You are saving a good chunk of change doing it yourself. Don't overdo it though. We want you out and about almost as badly as you want it. Hope your Dr visit was good.