I've never really met anyone who would sponsor a photographer in the way you're asking. Pay them for services rendered, yes. But sponsor them outright, no.
I can't tell from your question how long you've been doing photography. It's tough to get paid when you're first starting out, but as your skills develop the options start to open up.
One that's easy to do but tough to make money at is selling prints. I did that for years. To really succeed at this you need to market your prints hard. Of the people I knew who also did this at the time, the most successful had a booth at all the local fairs and farmer's markets, sold prints online, and pushed them every way he could. He worked practically every weekend. It was grueling to watch.
Another route is to do stock photography. This used to be a good way to market and use photographs you wound up making while doing other photography. For example, if you were contracted to do real estate photography of a property, but happened to turn around and photograph a flight of pelicans against the setting sun, you could market the pelican shot as stock. These days a lot of stock photography outlets have been flooded, and the stock agencies are selling entire portfolios cheap. It's a tough road to make money now.
One of the surest ways is to hit on a niche that you do, and do well, and get paid to do it. In the previous example I mentioned real estate photography. That's not a bad one to do, especially on higher end rental properties, but it takes real expertise. I know a couple of real estate photographers. One of them packs a van full of lighting equipment when he goes out on a job. It pays, but it's expensive to break into.
I do a lot of documentation photography. It's essentially product photography, but without the exactitude required of photography that would be used for ad copy. (I'm not trying to sell things. I'm trying to document processes and equipment. Huge difference.)
My cousin is a wedding and portrait photographer. She charges a day rate for weddings and an hourly studio rate for portraiture. It's been a while since I talked to her about what she charges, but it keeps her studio open. In the process she started writing equipment reviews and opened that up as a sideline business.
The down-side to all of this is that any one of these will typically require more than one camera and one lens to break into. You'll also have to spend a good deal of time developing and honing your skills before you'll be able to charge a rate that'll help you buy new gear. I wish there was a quicker way (I have my sights set on a couple of lenses at the moment that I can't afford!) But I haven't found one yet.
Whatever you do, don't lose sight of your love of photography. Pursuing it as a career or even as a semi-professional job can suck the life out of it at times. The pressure to make money at it often wars with the need for artistic expression. When that happens, grab your one camera and your one lens, and go out to do photography just for you. That's the heart of it, after all.