Was it a scam or a genuine call? I honestly think the latter because I think I asked the correct questions and I did indicate my willingness to work.
You cannot decide this based on your questions but based on their answer/s. As per the information provided, I suspect this may be a scam or genuine company but spending very lessnot ready to spend enough.
You can verifyverify it by asking them by saying,
Hi,
I am willing to conduct training for you in future, could you please answer to my previous questions.
If they are not answering properly or telling further excuses then it is a scam.
Finally, "Am I asking the right questions Or Am I being too careful?"
Yes. you were asking the valid questions.