@Alejandro Flores,
How you doing, sir?! Nice to see another fellow Houstonian doing his thing!
My organization is currently purchasing on average 25-30 distressed SFR's every month in Houston, all over the city. Ranging anywhere from Woodlands all the way down to Galveston. Let me tell you, I totally believe you when you say that it's hard to get a deal accepted at 70%, because those deals are VERY challenging to find in our market.
The reason that it is difficult is because there is SOOO much competition in Houston!! Everyone wants to be an investor, and if they're not, then they want to be a wholesaler! How many bandit signs do you see at every street light you stop at? I literally have to offer on 20 houses just to purchase 1 for my organization. That's a 5% conversion rate! Don't get discouraged if you lose out on A LOT of deals. Trust me, I get rejected all day long, that's the game.
The 70% Rule is a rule of thumb that many investors use in other markets. It could be considered the worldwide standard that is preached in every RE investing book you've read, and it even may have been true in Houston many years ago, but is not the case today. If you want to have a shot at the wholesale game, I would run my numbers closer to 75%-78% just to even be considered as an option by most sellers. But, you're going to have to build your buyers list with investors that can actually buy those from you. At the end of the day, a wholesaler is only as good as his list of buyers.
The best of the best deals will not be found on the local MLS. You really need to dig. Speak with every neighbor, put a sticker or door-hanger on every distressed house, talk to everyone at the gas station when you're filling up your tank, send letters, throw signs.... the list is endless! But it's doable, I know.
And if you ever do come across the mythical 70% deal in or around Houston, please be sure to give ME a call! LOL. You would have people lining up at the door for that over here.
Hope this helps my friend!
Good luck to you.
-Van