Hi Wizard, thank you for this journey. It's very interesting for me.
I would like to add my personal experience to this thread since I'm on the same path, having started a similar strategy 9 months ago

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I manage about 40 accounts now with a total amount of about 200k followers.
In the beginning I did follow/unfollow manually, while content tweeting has always been automated (RSS from top sites in the niche + IFTTT + other free services just to keep the timeline alive).
My first way of monetizing was mylikes, and is still working pretty well. With first earnings I was able to buy a bot (twidium) and now I run everything in full auto mode.
Two things that I've learned are:
1) most traffic drops if I stop following, even if I'm not losing old followers.
2) If you tweet the same link twice per day, it won't double the traffic. Do it three times, even with different accounts, and it's almost useless. Much better to use retweets!
My statistics are very similar to yours: 1000 followers gained per day, income about 4$/day, fluctuating results over the week.
I will follow your journey very closely

, hoping we can exchange knowledge! I'm very interest in Adsense/clickbank but haven't used them yet.
Good luck and keep on the good work.
Max.