Is my horoscope suitable for Business?

[akm]

Hi Astroboy and other respected pandits,

My details: Dob - 28/06/1975, Time - 02:03 AM, Place: Hyderabad, India.

Could you please analyse my chart. I've some interesting facts about myself and I'm confused as to what planetory combinations have caused this havoc and turn around and how it will affect in the future.

I was doing very good in school (nursery & primary school, to about when I was 7 or 8 yrs old). Things then started to change and I started faring badly in school, mainly between 9 and 12 yrs of age. I struggled to even pass my exams but some how got promoted to next grade and so on. I changed school for the final two years and some how completed it. I then studied Intermediate (class 11 and 12) in biology, again managed to pass the exams but wouldn't say I was a bright student. I then tried for a medical seat but couldn't get it so my parents got me into a private dental college. Studied for 5 years reasonaly OK and passed it, but then during college I started learning computers out of interest. Ironically, although I've completed dental degree, I've taken up a job in computers in 1999. Have never practised dentistry so don't quite understand how things have changed. It appeared as if it wasn't in my hands as fate had something else in store for me. After 8-9 months in October 2000, I got an opportunity to go to UK, and since then I'm here in UK working in IT sector.

Until 1998, I had a torrid time, with family problems, quarrels, father was sick, mother was working hard, mental pressures etc. Things improved 'radically' from start of 1998. My father died, we then moved home, pressures started easing. I found a job and quickly moved to UK. I'm now well settled, had grown in my IT profession well over the last 9 years, got married, bought a house.

Having some basic knowledge of astrology, I think the initial 18 years of Rahu has caused all the problems especially because it is situated in the 8th house. Assume it is malefic? Is the turn around due to Guru mahadasa that followed? I'm worried that soon Rahu antardasa in Guru will be starting. If so, will Rahu cause more problems again?
How is Sani maha going to be. Sun is in the third houe with Sani so is Sani combust due to this? Also, both Guru and Sani are vargottama. What will be the significance of this? I'm very keen to do some sort of business (real estate or restaurant), so is my horoscope conducive for Business or should I just continue with my profession?

Your views will be much appreciated.