My advice to you, would be to NOT trade silver futures, on the margin, with only 2,000 USD. You will fail, and fail miserably, and I'm almost willing to bet you 2,000 that this will be the case.
You should buy physical if you're going to invest that small amount of cash. Then sell after its above 50. Which it will probably climb, easily, back up to by the end of the year.
Also, try and find others to pull with and buy silver together, to save on the premium per coin.
Seriously stay away from trading silver futures with that little of margin to work with. You will get owned. Not to mention, if you have physical..it is YOURS and YOU hold it, it isn't in some vault with god only knows how much leverage against it, or if its even f'in there. You aren't subject to the comex rules on taking physical delivery either.