Elliptical - ProForm - iFit. It has several free walks you can take (videos of trails, etc. with a human guide) The machine automatically adjusts to the trail you're on. You get encouragement as you go so it pushes you further and longer. It also has a manual setting so you can just go as long as you want and adjust the height, resistance, etc. when you want to. If you do decide to subscribe to the iFit membership, you get even more, but it's not mandatory. I paid $1,600 for it (included a 3-year iFit membership) in 2019 or 2020 and it's still in new condition. I'm asking $350 but make me an offer! - Cash Only - The console was replaced and software updated under the warranty. So if they'll still offer you a warranty, go for it. You can sign up for iFit here: https://www.proform.com/ifit
It's heavy and large, so you'll need two people and a truck or van to pick it up.