Well it sounds to me like you need to make a decision. We all go through the same thing. Other than your graphics card. It sounds like you might have a computer that'll pull the load. Go check out Adobe and their new cloud applications. If you're really serious about this, for around $50 a month you can have access to all of Adobe's products, including Adobe premier Pro's CC Photoshop, illustrator the whole mess. The problem you're having is that you just don't have enough RAM to do the work. Also, your software is very much lacking. I know this is not much of a help, but it's the truth. Before the cloud came along. You had to upgrade the software at around $300 a pop, which gets expensive. One thing that you might try decrease your work area on your timeline to just the areas that you need to render if possible. That way you can do your rendering in small chunks.
John Henry
