Depends. Precisely you need a histogram of customer/company. So you will know how many companies have <5 customers, how many 5-10 etc. Using this info you can b

Depends. Precisely you need a histogram of customer/company. So you will know how many companies have <5 customers, how many 5-10 etc. Using this info you can build a quick model to decide how you want to go. There are other factors though like how fast the companies are to adopt new software. The big ones are slow.