Nickel can patina over time and I don't often like the look of the bronze with a stainless steel sink. I'd go with brushed stainless steel or chrome.

Change the pipes which material won't get rusty and corrosion, plastic or PVC is suitable. I think concealed rain shower system is more perfect for your bathroom. Check the link and choose the ideal set: http://www.homary.com/shower-faucets-shower-systems_c157

Tsilanko, I would always recommend professional installation where needed. But what I am doing here is suggesting that WHEN you are planning to build or renovate, to consider how your plans will affect you in 20 or 30 years time. Split levels are very hep when you are young. A kitchen 3 steps down at 30 is rarely a problem, but might be a hazard at 60, or, as Marjie1059 suggested, if you break a leg. ... All my parents' homes were terrible for old people. They were forced to move to a bungalow in extreme old sge because the location and design of their home was more suitable for an active young couple with a large family than for an elderly couple with stroke disabilities. I would not want to move again, so my present home has features built in that make ageing in place simpler. Mostly small changes, like grab rails, and lever handles on doors and faucets. A major disability suddenly suffered requires major changes if permanent. I did look at this because it came up in the discussion, but if you look at the heading, Planning for Disability, it means just that. Plan ahead so you don't have to make expensive changes later on. But thank you for your advice, yes, major changes are not in the DIY domain.

I do more activities to save water but couldn't be able to vote for other options. I stoped using pipe to water my plants. stopped using shower. and many more.