Obviously this depends on how much bioload, but the greater volume of water in a 1K gallon tank can more easily break down waste and absorb shocks to the system making it much less troublesome than a 10 gallon RELATIVELY. Clearly there is more tank to clean (algae removal and so on) and more water to change (periodic water changing is necessary) but the need to do so is less frequent.

Freshwater eh?.... That's a shame. In your case you will also need a sump (can use very cheap large plastic container for this hidden in a stand). You could easily buy filter media in bulk and place that in the sump along with activated carbon. A single return pump (big) would be all that is required, but I would recommend a couple of other powerheads to promote circulation within the tank. Get a pleco (fish) to eat any algae that may grow on the glass.

Do you want to have live plants in it? If so count on spending some money on lights, but nothing anywhere near as high as you would spend on a salt/coral setup.