Gary,
I'm in a similar situation. I started my business 5 years ago when the company I work for started laying off a lot of people. Luckily I did not end up being one of those laid off, but I have continued with my inspection business because I really enjoy it, and I love to continue learning.
I started by taking the ASHI training. I would like to take the code classes and exams, but have not done so yet, so I only do resale inspections. I do about 10 inspections per year, so I can not afford the E&O
insurance. Hence, I have an LLC. I have not had any problems with any of my inspections, but yes, it could happen. I would recommend a good pre-inspection agreement form, that you have your clients sign, which lays out what you do and don't inspect, and defines the limits of your liability (usually up to the cost of the inspection itself).
I really have not promoted my business much, and really just have 1 agent that gives me business (I need to get out there and try to get 1 or 2 more). My goal is to gradually increase my business, take the code classes, and some day take an early semi-retirement.
So I guess my suggestion is to figure out why you want to be a home inspector. If it's just for some extra cash, that's probably not a good enough reason. You really have to be interested in the business, and enjoy it.
Good luck!!!