Can you start consultancy on the net and earn money?

Of course,you can.Internet is a medium you can vouch for.There are many sites online like surefirehire and elance that enable you post your profile for free and take up jobs of your skill.I must however tell you that getting the first project can be time taking so you must willing to be ready to spend sometime initially building.Once you prove yourselves and have a good feedback from your client,its going to be easier to get jobs online.I hope this helps you.Good Luck.

There's alot of expertise business on the internet. But for your purpose, in my opinion, the best way is you must create your own website. Become an expertiser is about building your own identity and branding yourself. You may join some such website, but i think it doesn't worth for long term. If you run your own adviser website that's mean you are a new entepreneur,and this thing is helpful for rising your own reputation. People would prefer to ask a success man instead choosing randomly from a list. Good luck and have a nice day. Happy mylotting.