Engineering art can be improved. Blender is free, the tutorials amazing and even if the final result isn't great, you'll be infinitely more qualified to talk to artists which is helpful if you need to work with them. I also believe that putting money in your project is essential. If you don't believe in yourself enough to invest in yourself, why should others believe in you? If you don't have money, bootstrap your team by hiring yourselves out to other developers to help on their projects. That's how most of the bootstrapped studios I know of did it.