Welcome to the forums

Given your stated level of technical ability / willingness, I really would encourage you to shake the sofa and find $10 for Keyclone from somewhere.

If the issue is with payment methods rather than the actual cost, drop KC a private message - I've seen him offering to talk to people in a similar position in the past.

A single copy of Keyclone will ease the pain of running multiple WoWs on a single machine in lots of ways, and it's the most intuitive software available for that right now.

Add KC's on-the-ball support into the mix, and it's the absolute best solution for you.

You'll be up and running in minutes.

Even if you have to suspend an account for one month to raise the cash, and start boxing the month after, it's worth doing.

Octopus is described HERE (<- clicky). I have no experience of it, and will leave comments to those who have, but it is free and appears to offer the basic key broadcasting functionality that you need (both intra- and inter-machine).

Good luck getting up and running.