Real Estate Investing IS starting a business. Different people have different risk tolerance levels and education and preparation enables people to feel comfortable with risk. There are two extremes:
1. Jump in and go for it and figure it out along the way
2. Research, plan, analyze things to death before moving forward
Neither of these is wise, but some people will find success even at the extremes. The vast majority of people however won't. As a business coach who has helped hundreds of small business owners I recommend the following threshold before calling on the "suits".
Develop a detailed business plan.
Everything is created in two steps: 1. You build it in your mind, 2. You build it in reality. If you don't have a plan, then are making stuff up as you go along and you can get into tight situations and have to make quick, uniformed, un-thought-through decisions. Those increase your risk.
Educate yourself enough to be able to articulate the Real Estate Investing model you are going to follow and then follow it. This actually doesn't need to take long. One shortcut is to follow the business plan of another investor. There are plenty of great Real Estate teachers who have turn-key systems focusing on various strategies.
I suggest building an outline and putting on paper everything you need for your Real Estate Investing business and then focus and fill in each section as you learn. If that takes too long, then go the guru route. But whatever you do, have a business plan.