Please, give me suggestions, which I will turn into a paper //

Accounting Company decided to use a software called "Accounting". In addition to evaluating this software, AC has been approached by a range of companies who not only wish to be informed as to the nature of this software, but also wish to avail themselves of critical advice on how such a system or other similar systems could be acquired. Such advice would consider the types of decisions that a company would engage in when considering such an investment. The advice provided would also consider the potential sources of finance (at time of writing) that a company might consider when seeking to make such an investment.

What are the various internal and external sources of cash/funding a company might consider when seeking to finance such an investment?