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

Just to confirm I have taken the great ideas presented here as advice only and have no intention to do some dodgy diy reno's. With the exception of a couple of quirky exposed timbers as you can see in my pictures there are no other exposed beams. As you can also see from the pictures there is a large roof space on the right (east) side of the house but the ceilings themselves are flat with a slight dip on the north wall. Based on my own personal experiences I would have to agree with Two's Company that there is a tendency towards rendered brick in WA (although there are still many exposed brick houses in my suburb) while double enclosed double garages are also highly desirable. I would also agree that toilets within the main bathroom and non traditional laundries may be considered unusual by many (but not all). Ensuites with toilets however are still very common. Also due to the nature of our work we would prefer the laundry separated from food/kitchen area. For a 4x2 house it is only around 155m2 excluding carport/alfresco which makes the rooms feel quite cramped, hence the desire to open up the family room. However, as Two's Company suggests we will need to first get a builder/eng in to check load bearing walls etc as this will undoubtedly affect what we can achieve within our budget. Having said that I still excited by many of your ideas and with luck hopefully can work some of them into the budget. Cheers all :)

@jstirl91 the pavers in the 2nd photo look like they would work well with your house as the house is also a weatherboard & you're installing a similar roof. Castlemane slate could also be nice & comes in similar colour tones to the pavers in the 2nd photo 🙂

Colour is so personal . Myself , I actually would keep the existing blue tiles if possible , as opposed to going white . Assuming you aren't going to have colourful appliances on display , white tiles and white walls and white doors and white windows and a stainless range and hood and oak benchtops and floor doesn't get me at all excited ! In fact , look at the pictures . Imagine you aren't changing anything , EXCEPT you have removed the top row of tiles everywhere they don't 'hit' a cupboard , and replaced in a deeper blue , and you almost would have saved $5k ! A bit of a lift , a newer look -- the existing bits all look fine and usable to me .