Experiment with what you have by doing some test blocks and then decide your next step. There will always be a new gizmo and the latest, greatest technique to try - keeps the 'quilt/fabric economy' going. It's your project so you decide. If you need help in deciphering instructions or maybe doing a technique ask at a LQS or local Guild members - I'm sure they will help.
I agree about the expensive irons not giving the service that we would like - I saved to buy the 'latest & greatest' and it only lasted 9 months. Oh well, using a much cheaper model now that works fine! :)
Good Luck with your projects :)