Depending upon where you live and whether your nights fall into the low sixties or, more preferably, the fifties, some growers can get away with growing their highland Nepenthes outdoors in the simplest cold frame or in an unheated garage under lights. I do both in Northern California, bringing in outdoor plants only when there is a threat of frost.
Some that do very well under those conditions include Nepenthes aristolochoides, ephippiata, hamata, lowii, macrophylla, ovata, villosa, among others.
Those highland / ultra-highland conditions are also appropriate for Heliamphora and Darlingtonia . . .