I've bought 2 of these from Amazon in the past year for my wife, one up north and one here. She uses it to walk for health issues. She is 92lbs. Seem to be be pretty good, but I think if you weighed a lot it wouldn't hold up.
REDLIRO Under Desk Treadmill, 2 in 1 Motorized Portable Foldable Treadmill Compact Fold Up Walking Pad, Sturdy Folding for Small Space with Remote Control, LED Display Home & Office Use
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1