Answer:
They could be used interchangably, but not in every case. Let me explain
Step-by-step explanation:
Resource: This word sounds like the natural place where things come from. Like gold, silver, iron, rice etc. They sound more infinite to me.
Means: This word sounds more like how you manage to get something done. Like transport, money etc.
Now. While money is a means and a resource, transport isn't a resource. It doesn't come from anywhere, it enables us to move around.
Rice is a resource but it isn't a means to anything. To evade hunger if you want to be really creative :P
Do you see where I'm going with this ?
They can be used interchangably in some cases, but they don't mean the same thing. They have similar meanings.
Hope this helps.