For 2k even if it doesn't work out you can sell the runner and make a good profit easily.
The 4runner as a dd and the 84 for a wheeler seems like it would be easiest though. Your truck is already on propane and looks to be fairly built and the 4runner seems like it would be a nice comfy dd, especially with the power of the 3.4.
![My Two Cents :twocents:](https://board.marlincrawler.com/Smileys/marlin/twocents.gif)