You have spelled it out above, he has six years of top flight footy left. Richmond will have done the best rebuild of recent times if you are winning flags in six years without the assistance of F/S picks. The other ticking time bomb is the tassie team and what it looks like if you are drafting near the bottom at that stage.It's also a question of leverage - Soldo only had one year left on his contract. There's an incentive for Richmond to trade him because they have no leverage when he's out of contract.
Your second sentence doesn't provide any insight, of course 'anyone is for sale at the right price.' The difference is, Bolton has four more years left on his contract. There's no incentive for Richmond to sell him unless they believe he won't be as valuable next year. That's assuming they don't think he will be part of our rebuild, which is ridiculous given he has at least six years of top-level footy left in him.
Therefore, he isn't going to go unless a club is going to pay significant overs and make a deal Richmond wouldn't refuse. Those deals rarely happen and there's little to suggest that this isn't just more media BS. The Rioli trade is hard enough to believe, and that rumour has a quoted offer associated with it.
I don't think you do it though.