We are in Joyner, so also north bris, we had a house at Warner which we sold and this is also our first build.
We had an electrical budget of $10K which was recommended by our tender presented, ended up coming in under at about $9600. We added an intercom as we are getting a pivot door with translucent glass so we thought this was a good idea and we added the home theatre package with ceiling speakers etc.
We only have 21 downlights (opted to purchase ourselves and after some research ended up buying the packs of 2 they had at Costco last week - tested 1 and it's great!) as we are having mostly pendant lights.
Some unexpected electrical costs were the extra light or PowerPoint circuit breakers that auto charge when you reach a certain number of lights or powerpoints and the additional 2 way light switch costs.
We made some sacrifices including stair tread lights, upgraded light & powerpoints (satin range) and an alarm system (having it put in afterwards) to keep it under budget.
$15K is a great budget so you should be ok unless you want plantation to be supplying everything and then it gets really pricey.
We are also doing quite a bit after handover (or having someone do it for us) - the main ones are our flooring and alfresco decking.
How did u get electrical under 10k in trinity? We put allowance of 15k and got to 13... Wish we'd waited to meet sparkie onsite dos they'd have done stuff for us... Where's your electrical plan? I'll upload ours to,our page x