Building a house

[BENT_8]

So im after some tips on building a house in the near future, we've been checking out quite a few display villages lately and have found a house called the Vibe 3 by Distinctive Homes that ticks all the boxes.

This is our first build personally although we've been through a house and land package with our Son and in the process with our Daughter as i type this.
Both were off the plan developments where you pick a design, a site from a block of 6 or 8 that they have designated for that design and a choice of 3 colour schemes plus the option for certain upgrades.

For us it'll be different, do we approach the builder and ask about a house and land package, does that method require us to build where they already offer that package or can we decide on an area, a block that suits within that area and let them put it together or do we buy a block and then engage them to build seperately.
We dont want to go in without some insight.

Whats the financing process involved with each option, we'll be using Homestart due to lower start up costs to begin with and refinance at a later date.

What do you suggest?