So if the SNP were able to con the Scottish electorate into committing suicide then at the end of the day once the dust has settled from the resulting chaos of ripping the UK apart then England should start to reap the benefits of no longer having to subsidise Scotland in perpetuity. Though of course there will be a heavy cost to England of a breakup of the UK that could total as much as £120bn, especially as a bankrupt Scotland would be in no position to service its share of Britains £1.8 trillion national debt. So it could take more than a decade before England starts to turn a profit from the break up of the UK.
Whilst for Scotland, well the Scottish economy would have jumped over the edge of a cliff where the impact of the loss of the English subsidy would be felt near instantaneously. The Scottish economy would be in free fall, and it would not be too long before Scotland passes Greece on the way down as the loss of £12bn per annum would demand deep cuts in government spending that I am sure would result in the SNP permanently losing power in Holyrood for bringing about such a catastrophe onto the Scottish people.
Where the oil revenues are concerned, SNP fantasy has never matched oil price reality.
The bottom line is that yes Scottish independence would be pain for the rest of the UK, probably take the UK a decade to fully recover from its consequences. However, for Scotland Independence would be catastrophic as there is the real risk that Scotland may not even survive in tact from what would follow as bordering regions in severe permanent economic distress would soon start to demand their own referendums to re-join the UK.