MEREDITH, N.H. – Peter Muse’s tiny New Hampshire house has a fireplace, bathroom, 4-burner stove and outdoor hot tub. It’s also tax-free – resting on a frozen lake with a hole cut in the floor for fishing. “We’re out here so we may as well fish,” said Bob Myshrall, who built the 9-by-12-foot shack for Muse for about $2,500, including furniture. It’s an extreme version of the bobhouse – also known as an ice shanty or ice house – that fishing aficionados in northern states pull onto frozen waters each winter.