I lived in Las Vegas, NV (I am assuming you are talking about NV, not NM) for 11 years-ish. I never had a scorpion in any house or apartment while I was there. Yes they are in Vegas, but they don't want to be with people as much as we don't want to be with them. I have only had a scorpion in my house once and that was in the Phelan, CA (about 3.5 hrs SW of Las Vegas).
She will likely deal with black widows, daddy long legs and wind spiders more than scorpions. Monthly exterminators are about $30 a month...she may want to look into it (or get her own bug spray from Home Depot and spray monthly).