expansion of business

Having to ask the question suggest that the original concept is not working and that there may have not been enough product and market research done.

Hopefully this is an engineering business.

Please give more info such as - Type of business (Manufacturing / service ) etc.

You usually start a business to fill a need for the service you are providing. This entails doing some research and a small business plan to show that you can survive on the cash coming through the business. If you have not done this and simply started on a whim then you could be doomed to being one of the well in excess of 50% that go under in the first 12 months?

There are only 4 and a 1/2 rules of business:

1 Pay nothing for your inputs

2 Do nothing to them

3 Sell them for as much as possible while undercuting your competitor to put them out of business

4 Recover your money from your customer before you pay for your inputs

4 1/2 Exploit your family first

If you get anywhere close to these you will prosper.