You don't have to go that thick, 0.06 mm is available.Thanks for the support everyone, I wouldn't have been able to attempt DIYing it without the support I've received in this thread.
I just feel like I need to take control of as much of the process as I can because there aren't places I can go in Sydney. It'll also help me reign in the costs and make sure emergencies don't cause anxiety.
The part I have found the most difficult and emotionally draining is being objective about the results. The fact that I can only see myself from a limited number of mirror angles and the fact that I am so grateful to see a full head of hair on me makes it hard for me to be critical. I can see how some of the YouTubers end up with embarrassing results they think look fantastic.
I have no experience with lace, but watching the old videos by Curtis (mhe) where he bonds lace and talks about stretching the fabric and such makes me feel like I got into this easy.
I see a lot of conflicting information on this question but I am not sure how long a poly system lasts. Also. given how neutral the .03mm hairline is, I wonder how detectable a .08mm poly unit hairline would be.