1) Amazon affiliate sites. I have registered 8 domains, and I've written a couple hundred product reviews myself. I bought some review plugins, tried to use them but they didn't really work the way I envisioned. So right now I have the content just sitting on my computer gathering digital dust. The domains are a few months old now. If I go this route, I'd likely hire some freelancers to post and format the reviews, and also to write more reviews, then invest in some link building software and target my keywords that way. This is definitely a viable business plan, I see lots of people having success with it. It is also, I suspect, a slower business plan that won't see the rewards right away.
2) Nutritional supplement. I am currently in my 3rd year of medical school, and supplements interest me a lot. I have identified a niche with a strong need, there is already a strong market. I've identified a private label manufacturer, and have formulated a product that is significantly better than what most people are currently using. My plan is to develop a sales site with a sales letter, autoresponder stuff, lots of content on sub-pages, and promote and optimize it via PPC. Once I have it converting well, start an affiliate program with share-a-sale. The risk here is of course that the site could totally flop and I could run out of money before I ever make it profitable. There are also a lot of legal land mines in this industry. However, if I can get it working, I'll be raking in large sums of cash, as based on my keyword research I could pull in a couple of thousand targeted visitors per day.
3) Jewelery: I got interested in selling Jewelry after I found a large amount of jewelry in a storage unit that I bought at auction. I have sourced costume jewelry from China, and my idea is to create a sales letter for one piece, offer it at a great price, and then do upsells, and create an email list where I can promote different jewelry products that I import several times per week. The initial product stock would cost me slightly less than the nutritional supplement, with roughly the same profit margins. The PPC costs for this niche are roughly half of the ones for the nutritional supplement. So on the surface this looks like it might be a better deal. I do not know, however, if people searching for particular types of jewelry are as "hungry" for a solution as people searching for nutritional supplements. So I am not sure if conversions will be as robust (probably not since the PPC costs are lower!).
As I said earlier, it is unwise of me to do all three at once. I need to pick one and have a real go at it, and right now I am kind of in analysis paralysis. What do you think? What is the best one for me to choose with $5,000 to invest? Why? Or should I scrap all of these and do something else entirely?
Thanks in advance for any guidance anyone can give me!