jrvvn said:
Just don't want to make a wrong step, as I mentioned before I get 0 income from photography and lenses are expensive. If 24-70 would be enough for sure I would go for this one since it is very versatile and all the pennies I throw in I will use them and well, on the other hand 70-200 I have serious doubts, I'm afraid most of the time the lens will stay in the bag and not used.
That depends on your shooting style and subjects - if you need a telephoto just for this subject, yes, there a risk the lens will stay in the bag or at home.
The 24-70 is a good all-around lens when need one lens only, but it risks also to stay often in the bag when other lenses are available, and won't give you a real "tele" effect, you'd need 200mm or more.
You may look at the photos you'd like to take where the effective focal length is displayed also - it will give you an idea about what lenses you need. You may be tempted by a single image, but realize it's really a one-off for which isn't sensible to invest a lot of money in it. Borrowing or renting a lens may be a solution.
Anyway, if decide to buy one, you may save not a little going for the f/4 versions - if your main subject are landscapes you'll very rarely use large apertures, and the f/4 are also lighter to carry around, if you need to walk a lot to reach your subjects.
If you need to shoot without a tripod, an IS lens will also help you to shoot with smaller apertures without upping up ISO too much in many situations.
You may also opt for a fixed focal tele instead of a zoom, it may cost less, sure, less versatile, but if used less frequently it may not be a big issue.
Check also non-Canon lenses, they may cost less as well - they may be a little less performant, but again, stopped down usually this is far less visible (even to pixel peepers), and, after all you have to buy what you can afford, and avoid spending a lot of money on what may see little use.