>>1892334drop everything you're doing and go and buy this right now
https://dallas.craigslist.org/ftw/bik/d/fort-worth-khs-montana-team-mtb-bike/7591233283.html$120 is an insane deal for a bike with ritchey dropouts and logic tubing.
This is top of the line fancy, and in the perfect niche for you.
The build on it is shit (lots of nice parts in there though). You'll want to put some more money into it, but it's extremely worth it. You'll be able to modify it for any riding position, upright, whatever, and it would have been designed with touring in mind so will be great for your weight.
Perfect size too.