An IP is about 0.40/month or less bought in bulk, so, why not? an autoblog will make much more than that a month. About the .info, I agree, but it's a cheap solution when you have no initial money to go big.
Hosting charges? get a dedicated box, 150 a month, 2tb traffic, like 100ips or so.
Also, just because I would setup an optimal 1blog/domain, doesn't mean it should be your optimal setup, the several subdomains and main blog is good too.
So, making some numbers, say you have 1000 blogs on 200 domains, one host.
So, about 220/month in hosting(with IPs) plus, say 8.5/.com/year, that would be 4340$/year maintenance.
Now, earnings, 1000 blogs at 3$/month(and I'm sure you can get much more than that over time, just like you can keep adding blogs to the server, as you don't get much traffic, a single server can handle the load most of the time) would give you 3k month, so 36000 - 4340 = 31660$ earnings per year on such setup. You can always keep scaling up, as that is rather small if you ask me(I mean, why not go bigger?).
Also, you can hire some indians to find you the feeds and niches, pay them 2$/hour.
Hosting charges? get a dedicated box, 150 a month, 2tb traffic, like 100ips or so.
Also, just because I would setup an optimal 1blog/domain, doesn't mean it should be your optimal setup, the several subdomains and main blog is good too.
So, making some numbers, say you have 1000 blogs on 200 domains, one host.
So, about 220/month in hosting(with IPs) plus, say 8.5/.com/year, that would be 4340$/year maintenance.
Now, earnings, 1000 blogs at 3$/month(and I'm sure you can get much more than that over time, just like you can keep adding blogs to the server, as you don't get much traffic, a single server can handle the load most of the time) would give you 3k month, so 36000 - 4340 = 31660$ earnings per year on such setup. You can always keep scaling up, as that is rather small if you ask me(I mean, why not go bigger?).
Also, you can hire some indians to find you the feeds and niches, pay them 2$/hour.