Thank you all for your helpful replies. It's interesting to see how often families made the effort to have their deceased relatives sent back home.
I have come to the same conclusion that the family thought it was the right thing to do, no matter the cost or distance.
By 1900, some of her daughters had moved away to work in service or were working in the tinworks back home and would be able to contribute to funeral/ transport costs. Two of her sons were working by then too, the youngest being my x2 great grandfather, John Davies. Arabella also had a sister living in Bristol who could've helped with the costs.
And yes, @bbart, you are correct with the names of her parents

By 1902, her husband had remarried. I'm not sure when my x3 great grandfather died, but he was dead by the end of 1905, and another family was living in the family home by 1911.