Thanks for your feedback so far, anyone else is certainly welcome.
I'm starting to rethink and seriously lean towards certificates. To answer a point raised I'm doing currently enrolled in the masters online, but I've just got access to the course material. It all seems extremely basic, and I'm confident I could pass each subject with my self taught knowledge right now. I admit this is only the first 4 of 16 subjects, but I'm realising how largely theoretical the degree will be.
I'm fortunate enough that I'm pretty happy in my current field, so these qualifications (whatever type) is 90% because I enjoy learning, 10% because if I feel like it I can change professions slightly easier in the future. I think looking at it now perhaps the practical knowledge will be more useful, and enjoyable, for me at the moment.
Cost wise certificates to a point make sense. The masters will set me back $25600, which is an expensive learning experience. Admittedly it's nice I can defer paying it (hecs-help in Australia), but ill have to fork out eventually. Certificates are not cheap either, but it's all relative.
Sorry I know some of the above didn't have a direct question, I'm more thinking out loud and asking for a double check on my thought process
The biggest unknown I had was how limiting will and engineering degree be in applying for jobs as oppose to a specific IT degree. It seems the answer is a little but not as significant as I expected.
TL;DR most likely use the degree as a foot in the door showing work ethic and problem solving, then use certificates to demonstrate technical ability in the relevant areas as ill probably enjoy the technical learning a little more, end up with less debt and be reasonably valuable regardless.