Most of the people and corporations with large sums of money are not friendly to conservatism. They may be somewhat friendly to libertarianism, but they certainly don't support social conservatives, populist conservatives or traditional conservatives of the sort that Russell Kirk was.
Large amounts of money spent by large corporations and successful billionaires might lead to lower corporate income taxes, less regulation, freer trade, etc. But it will also lead to the complete enshrinement of gay marriage, abortion on demand, government provided health care, speech suppression, government/corporate spying, etc.
Corporations and unions should be banned from contributing.