Hi @Matt Bailey I think the answer is - sort of. The 1% rule is just a screening rule of thumb, to let you move on from properties that aren't capable of meeting it and zero in on properties that might be. It also doesn't help you determine what the ARV is, since that has to be based on comps and experience, nor with predicting cash flow - that would need to be done based on a detailed calculation as well.
For example - you might have a property that doesn't meet the 1% rule, but that you're able to self manage (so no property management) and that you get a great refinance rate on. Conversely, you might find a property that appears to meet the 1% rule, but is in an area where you'll need property management and that is going to experience high turnover, and that needs lot of repairs from deferred maintenance.
Hope this helps. It's a screening tool. All deals have to stand on their own based on your specific plan for them.