need advice ...ROI on Home upgrades / features

need advice ...ROI on Home upgrades / features
My sister lives in the SF bay Area, CA. She wants to upgrade her home with new kitchen granite, flooring, carpeting, bathroom tiles, marble entryway, additional new bathroom etc
She is wondering if "the upgrades" are a good investment ? and will they appreciate in time ? In other words if she is planning on spending $50,000 on upgrades, will this $50,000 appreciate at say 6% or would she better off investing in mutual funds ?
I have 2 important questions... 1.generally does get one's money back from these upgrades ? 2. Do the upgrades appreciate with the home ? ie if a home appreciates 6% a year in the SF Bay Area, CA would her upgrades appreciate as well ?
If you think this would bring in a good ROI, would you pls advise as to which materials to use ? What tiles, carpets, marble, granite are best for ROI and maintenance ?
She is totally ignorant with these things.
Any help would be highly appreciated.
Thanks Kim
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