a) it is actually US 75 as it is not an interstate.
b) only no-tel i know of is an old 40s-era motor court near the dallas zoo (not in your zone).
maybe Como Motel in richardson (n. of spring valley), the Econo Lodge north of campbell & south of renner. or any of the budget hotels near 75 & Park blvd in plano.
good luck in ur search for a delites getaway location.