Alkimos or Wanneroo?

My partner and I are looking to build somewhere in Perth as building seems like the most affordable option at the moment to get into the market. We have the option to either build a 4 bed town house in Wanneroo or a 3 bed in alkimos. Never lived in either of these suburbs as only been in perth for 5 years (renting in doubleview) and just want some opinions? Also considering buying a small unit somewhere more central but the market is crazy we getting outbid at every corner ! Any other suggestions on affordable locations, that are likely to be a good investment and comfortable place to live would be appreciated 🙏 Or if anyone just wants to rant about the current property market I'd be down 😂