@Graff I see. From your experience kasi mas solid ang estimating experience mo, so makakakuha ka ng mas maraming points when it comes to overseas work experience. Typically sa skills assessment nagbabawas sila ng 1 year, which they may classify as your "unskilled" year. If you will go with the skilled migration route directly (instead of studying),
you can try nominating Quantity Surveyor, which is under the engineering ANZSCO code 233213 and is actually <a href="https://www.anzscosearch.com/mltssl/">eligible for 189/190 (except VIC and WA)/489 visa</a>. Try to have your overseas work experience assessed for Quantity Surveyor occupation, and hopefully at least 9 years yung work exp mo para kung sakali bawasan ng <a href="http://www.aiqs.com.au/imis/AIQS_Website/Migration/AIQS_Website/Public/Skilled_Migration_Assessment/Skilled_Migration.aspx">AIQS</a> ng 1 year, you will still meet the 8-year work experience to get 15 points.
As they say, yung nominated occupation mo for migration isn't necessarily the occupation na pwede mo lang gawin sa Australia once you get there. It's just a pathway para makapasok at makakuha ng PR. So if you still want to study Building Design and work as an Architectural Draftsperson after you get your PR visa, pwede po yun. Sa palagay ko po kasi parang mas madali kung yung estimating experience nyo ang gamitin nyo para magmigrate instead of architectural drafting, since mas matagal po yung work experience nyo as estimator than draftsperson.
Kung gusto nyo po naman na tumuloy ng aral ng Quantity Surveying after getting PR visa, pwede rin po. Kung naghahabol po kasi kayo ng points for migration (like sa age cutoff), mas ok na mag-apply nalang kayo ng PR visa instead of studying bago mag-apply for PR.