Don't get bankrupt for this, its not worth it. Shut it down temporarily, try to make the MVP really minimal in your spare time.

The product you describe seems to have huge scope. Try to make it really focused, like an an NFL only fantasy league (the most popular sport).

You should really get developers that know already Angular and Node, those technologies are just not learnable overnight.

Other than that it seems like a nice stack, I personally would go for a backend based on socket.io and mongoose.

Any change of having people working remotelly to reduce office costs?