Please be aware that strays need shelter. With the coming winter extra food and clean water is needed to build strength to endure harsh temperatures. And comfort, like straw beds, blankets, dog houses and heat lamps are very appreciated.
As a former homeless kitteh I remember how relieved I was when I found a forever home. If you can't afford to adopt your winter strays, perhaps you can provide them with a little comfort to get them to Spring.
Everyone should have a Wonderpurr Life!