If you need to ask such a fundamental question, then I would suggest that you are not in a good position to judge the quality of any investment that you may be making.
Go and see your bank manager and ask his advice. If you actually get to find one in your bank, then you will have done exceptionally well and could well have what it takes to be a business investor. If not, then find an accountant and ask his advice.
Make sure everything you do is documented properly.
No bank will lend you a dime unless you put up real property as security under a personal guarantee.