Oxygen Concentrator for Kittens

Little Peanut made me realize that I need some new equipment for my fosters.  The oxygen bottles that I used for her were not enough.  I need an oxygen concentrator to do long term oxygen. 

The unit I am interested in costs $599 before tax.  

Any funds raised above my goal will go towards a second incubator. 

https://rcom-incubator.com/collections/brooder-accessories/products/portable-oxygen-concentrator