By tomorrow I will have 111,000 followers on twitter. I'm the 1336th most followed person out of 106 million. I know how to get followers. I increase by 2500-3000 new followers per week. You will have to have a tweetstream going. If you don't twitter will only let you follow about 20 people a day. With a regular tweetstream you can follow 500 people a day. I insist on being paid in advance since if you decide not to pay I can't take your followers back. I recently boosted someone by 15,000 followers and they just decided not to pay, so I was out the time I spent on his account. The 90 days is ballpark since I don't know your topic or tweets. Might take longer, might take less. I don't do bots or software. I do everything by hand. I'm yvettegr on twitter. Also you can check my stats at twittercounter dot com forward slash yvettegr.