Hey Justin,
No replies? Weird.
So the 70% rule is essentially just there so you can quickly screen a flip and not waste time analyzing properties that likely won't work. So after you find a property that passes the 70% rule (i.e. the property in question is selling for less than or equal to 70% of the ARV, minus repairs), you'll need to look at the property with more granularity.
In other words, you’re going to want to figure out the following:
How much do I want to make?
How much will it cost to rehab?
How long will it take?
How much will it cost me to hold onto during the rehab?
What will my closing costs (at purchase and at sale) be?
All of those questions will determine whether or not the deal will actually work. The 70% rule tells you that there is a CHANCE that the answer to those questions will reveal a deal.
You should go look at the property at this point. If you’ve never rehabbed before, the answer to those questions may come from a contractor you ask to walk through the property with you. Once you have those answers, you can put together an offer.