That's all down to personal preference, although personally I agree with sand and live plants but it doesn't mean that everyone has to
A 10 gallon tank will make a fine home for these guppies, but it's true that Zeira won't be able to add much more to it if she decides to get more fish later.
I would also have attempted to clean and keep the current tank but Zeira can see much better than us how bad it is. Rust and scale can be removed and I quite enjoy refurbishing second hand tanks by now - but none of them were as bad as this one, especially if the electrics have been compromised.
A 10 gallon tank will make a fine home for these guppies, but it's true that Zeira won't be able to add much more to it if she decides to get more fish later.
I would also have attempted to clean and keep the current tank but Zeira can see much better than us how bad it is. Rust and scale can be removed and I quite enjoy refurbishing second hand tanks by now - but none of them were as bad as this one, especially if the electrics have been compromised.