gmat 640, what are my options? profile evaluation

Hello,
My name is Salik, I am from Pakistan, I wanted to know what are my options for b school applications. My profile summary is as follows:

GMAT:
I gave my GMAT today and scored 640 [Q=42(47 p),V=35(76),IR= 6(69p) ]. I want to apply to schools in round 2 this year, so in worst case I wont be able to retake my gmat. I have taken it thrice 640,590,640 gave my first attempt in march 2016.My quant score is low but I have had various mathematical courses during the university, few of them of advance level including physics, numerical analysis, calculus advance etc. I may also be able to request my recommenders to emphasize on their observations on my quant skills.

Education:
I did my BS of computer science from Institute of Business Administration, Karachi (Oldest and one of the top business schools in Pakistan). I graduated with a gold medal and a CGPA of 3.42.

Experience:
I work in IT department of Dawlance Group of companies. It is a market leader in home appliance industry in Pakistan since 1985. Recently, Arcelik has acquired the Dawlance to enter south Asian market. I have had 3 years of experience, got promotions every year and am currently the youngest Deputy Manager in the company's history. My latest responsibilities include managing IT team and initiatives in 2 of our manufacturing facilities in Pakistan.
I have lead various cross functional teams and have completed projects requiring systems overhauls, change management, employee motivation analysis and operations automation.Also,I have been doing projects consistently with top executives/directors of my company, I have had projects that required me to interact with our vendors, low level employees and occasionally our consumers too. I has also awarded outstanding Mentee award under the internal program in our organization by the name of leadership without title.

Social work:
I have been an active social contributor, recently, I built a team in my city to run a plantation campaign in Karachi. Moreover, I did a social internship back in university. Where I lack is that I do not have a documentation proof of that.It was a recently concluded plantation campaign, I played my role in gathering a team to achieve a target of 100 plants in my area. Other than that, I have been involved in evaluating start up ideas for a course in my university as an alumni evaluator at various events and classes

Ambition:
My aim is to list myself in the list of world billionaires before turning 40. Also, build a start up around renewable energy for Earth and beyond.This part I have found to be the toughest to be honest. the progression of my career so far suggests me that I should aim at the CIO position in the long term. However, I feel strongly to work towards a for profit social start up. I don't have a prior experience with entrepreneurship other than an idea that I developed and worked through with a team but we could not execute it on the ground.


I would really appreciate if you could tell me what are my options? I realize that top 10 may be too ambitious. but can you give me 1 from top 10 (I had Johnson in mind, even with slim chances), may be 2 from top 10-20 (said? tepper?) and may be few lower ranked school where I may actually stand a good chance?
I am considering Michigan state university, its a top university for supply chain mba and has an avg gmat of 668, what do you think?


Thanks!