It depends on your level of the experience and how deep your pocket is (budget). Basically, if you a new affiliate, I would suggest starting a narrow niche site, because there is less competition, so it is easier to rank without many backlinks and content. Nowadays it is really hard to rank for general keywords, because there are much more websites online and there are also giant companies that control lots of search rankings.

You might add categories to it that will be your niches that you want to populate your sites with. It can be made with the cam embed scripts like the Robo one, but also with the blog and tubes but it would be better to have a name that centres around a specific topic and you can keep the general one and post backlinks on it.

If you buy the domains, the only things that matter are that the name is good, preferably contains your aim keywords unless you need it brandable and it can help if it has some good backlinks, but the age does not matter much if there was no real site on it or it never ranked for anything.

No offense, but I do not like being called the boss but I think that you are being kind, so I appreciate that.

You have to try things for yourself. If the backlinks are good, then it would way easier to get it ranked.

I like the email notification feature, I thought about implementing about it earlier and I will try to add it, thank you.