First question: does your wife's business need the capital? Investing in an enterprise to get a tax deduction rather than for sound business reasons is generally not a good idea.
Note that to qualify for relief you will need to show that the capital investment is to be used to maintain employment in the business, or for research and development. So it's not enough that there be a sound business case for the company to seek this capital, but the business case must require the capital to maintain employment or for R&D.