The Worksman M2600 I really can't believe has a weight limit of 350. Read the user reviews, there's a 5-star review from a happy 500-lb rider. (And another review that claims a weight capacity of 500, that doesn't match that user manual but I believe it).
$419 base price, $100 for the 3-speed upgrade (otherwise single speed). Another page I saw for a different bike recommended the Front Drum Brake upgrade for riders over 300, that's another $80. So $599 for a bike that, if you see it in person, I think you'll have faith that it will bear your weight, for your lifetime.
IF that's the kind of bike you want. A mountain bike would probably be more playful, a worksman is mean to get work done, ride around factories towing cargo, etc. WIll do great for riding around town, to the park with the kids, can even use for exercise on smoothish trails.