Build a website landing page

This is for a Property development project for an apartment building development in Perth Western Australia. We already have a domain name and have a hosting account, i.e., csideapartments.com.au. I need a website design called a landing page. This has to work on all formats, mobile, Tablets, Phones, computers, etc. It will contain no more than 4 pages but the ability to capture prospective Buyer's details and email these enquiries to one or more email addresses. I have to be able to log into the wordpress back-end to make modifications, like changing wording, etc. I have experience with a system on Wordpress called Eelegant estate. Please look at the website www.capricegardens.com.au. However I want something that is more professional. This is not for this development but for a different one called [login to view URL] Apartments. I will provide all renders, logos, photos and pictures. I attached some files to give an idea of what I already have. It has to be optimised for google searches as well, where possible. We want to see similar projects / landing pages on the internet. If you can demonstrate how the website can be optimised for google searches please. Please send your proposal with recent landing pages you developed.