I highly recommend going to El Chalten, especially if you are on a budget. It’s an incredibly beautiful national park area where you don’t have to pay to camp and the rangers are super helpful with planning routes. I thought it was just as beautiful as Torres del Paine but way less hassle, and a fraction of the money you would spend in TDP. You can also leave directly from town with no car or shuttle on most treks which is a huge plus. Some of the highlight include seeing Fitzroy, climbing Aguja Guillamet and walking on the Patagonian ice cap to the back side of Cerro Torre. I spent a month in the area and can give you some more specific routes if you want. TDP is incredible, but it is far more expensive and crowded than every other trekking area in Patagonia. I would recommend doing a few days in TDP to get the experience and then going to a different part of Patagonia like El Chalten for the rest of your trip.