Welcome! I don't know much about the wheaties in general but I feel like your schedule is one that any dog could accommodate with proper training. The fact is, most people have jobs and need to be away from home for long portions of the day. Using crates or x-pens is pretty common and usually successful. Do you have anyone that can pop in to take her outside once during your longer weekend shifts? Depending on the age, 8 hours might be a long time for a smaller dog to hold things in. Also remember if you're getting a puppy, those timelines are out the window because you'll need to be letting a puppy out about every 30 minutes. In your situation, I'd recommend finding an adult dog that has already been through basic potty training.