Take the 30k, find a profitable online/offline hybrid business. Find a partner who is very good at that business, has licenses, is able to operate it efficiently. You will take 25K and expand his business and use your IM skills to bring customers to the business. For your investment and your marketing contribution, you will get a certain percentage of the business, 30%, 50% 70%, whatever you guys determine is fair. Make sure it's a profitable long term business that you are able to generate leads online with. With the other 5k, buy yourself something you want, try a few IM strategies, leave yourself a little reserve cash, whatever. You should have 4 months reserve cash or autopilot income that covers your expenses.
Once you find your partner, take a month or two to learn the industry and plan your strategy. Make sure it's something you enjoy and can learn within a reasonable amount of time in case you have to take over for your partner if he needs a break or gets sick. Maybe even take a training course or some classes at school or have your future partner train you on the day to day operations. Plan every single detail from how to split the money, how much to leave in the business, salaries, when to hire employees and purchase equipment, what equipment and infrastructure you need, buy or lease, used or new. 30K is a lot but it can go real quick if you hire 5 people, buy them all brand new computers and desks, get an unnecessary expensive office and the employees don't produce or the business is slow that month.
Build a long term business. IM is great, it's been great for many years. But 25 years from now, who the hell knows what the internet is going to look like, if Gobble & facebook are even going to be here anymore or if the little man will have a fighting chance after the politicians sell the first page results to the big corporations.
Good luck