I'm glad you are.
I will do everything I can to prevent it, but a result of this election is that there's a very real chance that my company will be out of business in two or three years
Almost certainly wrong (and hyperbolically wrong). I assume you're referring here to the promised EU in/out referendum? I will tell you now, with more than 95% certainty, that the result of the referendum will be for the UK to remain part of the EU.
Cameron has promised the referendum for three reasons and three reasons alone: firstly, he knows it will appeal to the die-hard Eurosceptics among the voters, who might therefore have been persuaded to vote Tory rather than Ukip (or even Labour or SNP); secondly, he did it to appease Eurosceptics within his own party, for internal political reasons; and thirdly, he did it in order to create a strong negotiating position for EU reform (and specifically reform of the UK's deal with the EU).
Cameron has zero intention (or desire) to take the UK out of the EU. What will happen is that there will be a period of renegotiation with the EU, after which Cameron will return "in triumph" (a la Neville Chamberlain from Munich

) with a new deal, after which he will announce that now the UK has a better deal, there should be no question that the UK must stay within the EU (indeed, you'll hear lots of "at the heart of" the EU). The referendum result
will be a resounding "yes" for staying in the EU.
and that the UK economy will hit a depression which will make the last seven years look like a cakewalk.
Almost certainly wrong (and more hyperbole to boot). This is sounding more like the rant of a devastated Labour voter than a dispassionate analysis of the situation, I'm afraid. The limited austerity measures will almost certainly lead to continued slow recovery.
Personally I think it's perfectly acceptable for someone who will benefit from Conservative government to vote conservative. The ones I would classify as "thick" are those who either haven't thought it through or who have swallowed the anti-Labour and pro-Conservative propaganda and have voted against their interests.
Most of the electorate don't know what they are voting for, other than in
extremely broad terms. That's a political truism. People vote overwhelmingly for the party that they and their parents/friends/peers have always voted for. The small proportion who don't vote for personalities rather than issues.
A US political commentator once (correctly, though exaggerated for effect) stated that you could put a monkey up as the Republican presidential candidate and it would still garner 40% of the popular vote. Likewise if you put a monkey up as Democratic candidate. The same is broadly true in the UK - 30% will
always vote Labour, 30% will
always vote Tory, 25% will
always vote for one or other of the remaining parties. The remainder are more likely than not to be swayed by intangible "soft" factors - in this instance, the chief factor by a huge margin (in my opinion) was the negative sentiment for Ed Miliband. That's democracy, comrade.......