Changes are necessary both for the pleasure of refurbishing and because of the need to update what time has caused to age or deteriorate.
It should be borne in mind that a big budget is not indispensable to make over a space; what really matters is to prioritise goals:
Assessing the space carefully
Harmonising natural light and conjuring with artificial light to play its necessary part
Knowing how to combine the extensive range of materials which exist on the market