I have a lot of great ideas, but most of them are just thoughts and theories, and it seems that no one would want to read about, even pay for, ideas in which I am not a complete expert on. My greatest talent, perhaps, is being a prolific writer. Otherwise, I’m more of a Cliff Craven I know a lot about some things, and some about a lot of things. How does THIS make MONEY??
Notice that I avoided putting a specific dollar figure on the amount you can make from blogging. It will come down to your work ethic, your skills as a writer, your ability to generate targeted traffic, and plain old good luck. It’s a bit like baseball: everyone played it as a kid, only a small fraction make it to college ball, an even smaller number become professional, but only the cream of the crop makes it to the majors.
I’m trying to get going for the minimum cost in the first instance. So, my question; is it possible to have more than one blog (or niche) attached to a single website? I have been advised it will cost around £250 for a basic WordPress site (once you have domain, hosting, theme etc). I have done a lot of work with small businesses as an advisor and specialise in marketing. I’m considering offering online courses and e guides. however, I would also like to blog about my hobbies of walking and motor homing. It’s just where to start!
And so, I guess my question here would simply be–would a person who follows your blog about TV shows be interested in paying for a TV-related webinar you created? Would a person who follows your blog about vinyl record collecting want to buy an online course from you? Would a person who follows a travel blog you created want to call you up for coaching lessons? 

Just started an idea and discovered your info. Very helpful. I am over 50 and a little late in the tech game because of past jobs that required little or no time in front of a computer. I am a very good writer with many a published article to my name over the years BUT now journal writing by hand does little or no good in the world of tech. When I get this blogging thing going, it is gonna explode.
Just be aware that affiliate marketing with the wrong company can damage your brand. For instance, I started my blog w/ Blue Host because of Pat Flynn’s recommendation – which I am sure he was paid for. I am now on day 5 of my site, and e-mail being down, with NO estimate from Blue Host as to when it will be back up. As a consequence, I wouldn’t buy a thing he suggested or endorsed, because of my experience with someone he put his seal of approval on. Blue Host has a HORRIBLE reputation among the community, and I even wonder if anyone would “recommend” them unless they were being paid.
Trust continues to be a major issue on the World Wide Web between bloggers and readers. Readers want to see bloggers posting lots and lots of meaningful content to their sites on a daily basis and giving them something to think about. It’s relatively easy for a person to post once a week and expect readers to be converted into repeat buyers when that’s certainly not the case toward being a successful and profitable blogger. Creating quality content and putting people first puts a full-time or part-time blogger in the front seat to earning honest and passive incomes from affiliate marketing.
Fortunately, there are many resources available to help. In addition to the BlogHer events and site, some of my personal favorites for learning tips on writing compelling content, marketing and monetizing are Fizzle.com, MichaelHyatt.com and Problogger.net. All three provide lots of free advice (and more in-depth training and support is available for a fee).
One added benefit is that if someone clicks on a link from your website to Amazon and ends up buying multiple items (not just the item you are promoting), then you would get credit for the entire sale! Imagine you recommend a book on Amazon, your visitor goes to Amazon to buy a book - and while they're there they end up buying a new TV, a Sony PlayStation, and some other things... you get credit for all of the sales. Not only that but you also earn from any sales you make in the following 15 days from that customer.

If you want a more concrete answer than that, we’ve found it takes even our smartest, most dedicated students 3-6 years to make enough money from blogging to quit their jobs. And that sounds like a long time, but so what? 3-6 years to be able to work from anywhere in the world, take a vacation whenever you want, and probably have passive income until the day you die?
Make it easy for readers to browse – If you want more pageviews, you should make it as easy as possible for readers to read your other blog posts. You will want to make it easy for readers to find your blog homepage, categories, tags, search bar, and so on. Also, I recommend including links in every single one of your blog posts, so readers can easily find related topics.