Hi Chris The cheapest option is Grind & Seal, but we usually recommend Mechanically Polished Concrete for inside of a home. This is by far a better option, if you were to go for a Matte or Satin finish it is less expensive than a higher gloss finish. Mechanically Polished Concrete does not have a top coat sealer requiring drying and curing time and does not need re-applying in the future which will save time and money in the long run. Because Polished Concrete does not require drying or curing time it can be used as soon as the process is completed unlike the Grind & Seal option. All floors are slippery when wet, a non slip agent can be added to a top coat sealer which would be the Grind & Seal method which we do apply in a shower area if there is not a shower base. Polished Concrete in Matte and Satin finish does have a very good slip rating, has no grout lines as with tiled floors where dust can get trapped therefore it is a wonderful easy to clean flooring solution. Hope this helps, I have provided some details regarding the 2 main processes below There are 2 different finishing processes / methods that are commonly called Polished Concrete, they are very different so it is important that you know the difference & which process/method you want and which is being used on your concrete Polished Concrete - 12 to 17+ step process During this process the concrete is ground to the desired level of stone exposure. After grinding the concrete surface, the Polished Concrete process begins. This process has a densifier applied in multiple stages that is absorbed into the concrete which hardens and strengthens the concrete. A Polished Concrete Floor is Polished in Multiple stages in a Refining Process using diamond tooling & resin pads. A penetrating sealer is applied in the final buffing stage to complete the process The "Polished Concrete" process has "NO TOP COAT SEALER" applied therefore there is no drying or curing time required so your space can be used as soon as the process is completed Grind & Seal (a 3 to 4 step process) This is NOT Polished Concrete. Grind & Seal is often referred to as Polished Concrete, this is the cheaper substitute that gives a "Polished Concrete Look" With the Grind & Seal method the concrete is ground to the desired level of stone exposure and a TOP Coat Sealer is applied such as water based, solvent based, urethane, acrylic or epoxy requiring 5-7 days to dry & cure

Love it as is. Well done. The void above living will let on light, just be careful of not letting in the western light too much. So some way to shade house on the backyard end. would be good.

I would suggest Luxury Vinyl Tiles, especially for a kitchen where the floor could get wet.

Every month seems to bring new flooring products to market that claim to be water resistant or waterproof. But how do you know which products are suitable for wet areas in your home? And what rooms are considered wet areas? Selecting the Best Flooring for Kitchens, Laundries & Wet Areas Which types of flooring are suitable for use in wet areas? So long as your floors are properly waterproofed in accordance with the NCC, Flooring 2 You’s range of Hybrid flooring is suitable for installation in bathrooms, laundries and toilets in domestic homes without floor wastes (Not to be installed within the shower or near a drain). Our hybrid flooring is completely unaffected by moisture, and 100% stable when exposed to topical moisture on a regular basis. Hybrid planks are composed by creating layers that are resistant to water and scratch-proof that are made to last: The top layer is treated to make them stain and scratch proof. A decorative layer gives it the look of timber. The rigid core is innovative that provides stability, especially against changes in temperature and water, including heating that’s underfloor and windows that are north-facing. The last layer is the acoustic backing that helps with noise reduction. When it comes to other areas of the home, other products are also suitable provided the proper maintenance precautions are taken. For more product specifications, care and maintenance information, please refer to the respective product pages. https://flooring2you.com.au/selecting-the-best-flooring-for-kitchens-laundries-wet-areas/