How Do? Fast track advice?

[m_c]

Nick is on the money.
With a good quality router, you could probably manage aluminium to a good enough standard for moulds, but good quality certainly doesn't come from cheap Chinese.
Stainless is likely to kill even a good quality router type of machine, as it really does need rigidity. Without rigidity, you'll quickly learn the pitfalls of how easily stainless work hardens.

[cropwell]

I'm a bodger on a budget, but all my miserly strings sing in unison - No Way!!