Elliptical exercise machines are pretty stout and can handle different weights depending on the model of Elliptical exercise machine you buy.
Some of the lower cost Elliptical machines can handle from 100 lbs to 300 lbs while other higher end and more expensive Elliptical machines such as the Sole Fitness E 95 exercise machine can handle a weight of up to 400 lbs.
So you'll have to check the weight limit of the Elliptical machine you want to buy which should be in the description of the item on the website or on the tag in the store.
The higher priced Elliptical machine costs around $1,800.00 so it's not cheap but it's made to hold a lot of weight.