Upload & Sell: Off
I don't know much about starting a business where you are, but this seems quite a strange way to start a business.
My first guess is that your photography skills are not that great. If you wonder whether you should get the 24-70 vs 70-200, I doubt that you have any experience shooting a wedding. First of all, the 50 is not even close to being wide enough. The 70-200 is a great portrait lens, but it's not going to help you into a crowded room. If you want to get a full-body image of a bride getting ready into a tiny room, you will more than likely need something like a 24mm focal length. So, there is no question about it, you will NEED something wider than 50. Also, depending in the type of events you shoot, you may also need something longer than 100mm.
I would think like this:
- Do I have a decent computer?
-> If yes, then try Lightroom/PS on it. If it works, don't worry. Also get an antivirus program.
-> If no, get a recent one with a decent configuration (windows based) and work with that.
The reason for this is that you will not need too much computer power in the beginning. You won't have that many jobs to justify spending a few thousands on computer hardware and software. When your computer will slow you down, you will have the money to get a shiny new Mac, because you will have so much (paid) work to do on it.
Then camera gear:
- You will NEED two cameras. You don't want to get your beloved D600 broken in the middle of an event like a wedding. So, go for a used D700 as backup.
- Get the 24-70 and maybe a cheap 85.
- think about all the small things you will need: a lot of cards, batteries, chargers, bags, all kinds of small things that will add-up and will cost you something
- try to buy used items.
Keep some of that money for other expenses like a good site, some promoting of your business.