I'd love to see a contractor try and relocate Spinball without dismantling it into at least sections. If, for instance Towers decided to put it in Coaster Corner [inside a building to address the noise issues / proximity to Alton village], how would they get it there without dismantling it? It would be impossible.
Also, they cannot just put it anywhere within the Towers site. If it's going anywhere within proximity of the listed buildings on-site, they would need listed building consent from the council. I remember James Paulding mentioning the "fun" they had with Battle Galleons due to it's proximity to the stables block [Courtyard]. Even if they wanted to change the tiniest bit of theming it had to go to the council & English Heritage for approval to ensure they were not spoiling the views of the stables block.