I'm in North Dakota and haven't had problems. As for how long 'it' can live in the soil, it's a protozoan parasite and doesn't actually 'live' in the soil itself. It can be picked up by earthworms eating the infected poop and spread that way. Chickens aren't the only way that it spreads, it's just that chickens can have it and show no symptoms. Wild gamebirds can spread it, too. In addition to asking your local ag folks about it, you can also check with others in the area that raise gamebirds and see if they have problems. I know Dept of Ag in MN has pretty tough regulations on gamebirds, so hopefully they would be knowlegable if it's around. ND doesn't have a Poultry Testing Agent course, they tell interested folks to go to MN to take the course. I went to MN for it and was pretty impressed with your Ag folks there.
Good luck, I hope everything works out for you!