Honestly, given the difference in size to her previous home, she should get some basic furniture and live in the rooms she plans to live in later. Work out how the space works for her, what the lighting is like in different areas, what she needs etc. and then, in 6 months when she knows what she wants and what will work get the place done up properly. She can be frank about that, people would understand not wanting to commit to a potentially expensive mistake, even rich people don't redecorate every 12 months.
My problem with her is that on the one hand she tries to portray such a fairytale lifestyle and on the other hand quite frankly seems to be in dire straits financially. She could just be a bit more down to earth in her videos and explain her process, her ideas, her plans, not being quite sure what she wants yet etc. That would create content that isn't garden related, isn't going on about gifted things, isn't expensive and would even give her a bit of breathing room regarding the expectations of her viewers, it might even up her engagement, who knows.
The constant garden content is boring, but watching a painter paint the walls isn't much fun either. Watching her and Pink Shorts do it might be entertaining though. And it wouldn't be a massive expense that results in different coloured rooms with... still no furniture.