thank you for your input
How exciting, and a great plan for living independently while releasing some equity to enjoy life and achieve companionship. Co-Living is an idea that is likely to be a solution for many family types as housing costs increase and available land decreases.
I think you are on the right track looking to build what suits you - otherwise someone will be in the second-best spaces in a home not built for sharing. (You'll also be future proofing your build for changing circumstances too). The key will be to include some flexible spaces (particularly with a second living/guest room space plus laundry/storage as you suggest) that will give you the function you need, while providing separate bed/living suites ensuring each of you has your own spaces to decorate and relax in. Spaces don't have to be Big. Start by making a list of what you each need/want, and the things that you are happy to share.
Hi Ruby, Is this for a commercial project? Or are you are planning a residential project? A more cost-effective option might be Nu Wall Aluminium cladding, using their Mono 200 panel with feature finishing. We have designed several homes for clients wanting the maintenance and aesthetic of aluminium cladding. Happy to talk through options.