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I'm 25 and I've been saving up for a few years. I have a good amount of money saved up and I feel that I'm ready to make an investment in purchasing a business. I currently have a great paying job and excellent credit, but feel as though I want to try venturing out into something else. I've been thinking about investing in a self automated car wash business. Since everything is automated I can still keep my job and just spend a few hours a day after work at the car wash and apply myself full time if needed on the weekends. It seems like this would just be a perfect way to make some extra cash on the side.

I have a good friend who also has a full time corporate job and is partly interested. Would it be a good idea to partner up as it'd be easier allocating time between the two of us for maintaining the business?

What are some things I should look out for when purchasing a business?

Can anyone offer any advice specifically or generally in this type of business?