Is that a researched statistic where they took a random sample of various participants in various guru programs and then then they defined what being successful meant (such as earned more than the cost of the program in profits over a 2-year period of time) then they followed up with them over the 2 years and then had their research study peer reviewed for accuracy and then published.

For even more accuracy, we choose to only use comps that are 1/3 mile away or less, with sales dates within the last six months.Sometimes, even the street can make a difference in the value of a property.If the only comps you have are on very nice streets, but the house you're considering is on a very "distressed" street, then you have to reduce the ARV.How much is an appropriate reduction is a judgment call on your part.You'll want to base that call on how much of a discount will be necessary to entice the final owner/occupant to buy this property over one they can get on the "better" street.If the comparable sale that you are using is too different from the subject property, then it is of little value.If you use it in your sales marketing, you’ll lose credibility with your Investor Buyers.An example of a poor comparable is when your subject property is an old cottage fixer-upper, and you compare it to the sale of a brand new in-fill (an in-fill is a new house built on a vacant lot in an otherwise established neighborhood).Rehab dollars vary according to level and detail of the job â everyone has a different formula.As a wholesaler, we suggest a middle-of-the-road approach for estimating enough rehab dollars to get the subject property to look like the comps.You'll need to spend more on rehab as the ARVincreases.Logically,buyers like more âpretty-ness', higher-end fixtures, cabinets, etc. when they're paying $200,000 vs. when they're only paying $100,000 for a house.Buy/Sell/Hold costs are all of the costs associated with:üThe purchase (loan origination fees, title insurance, attorney fees, survey, appraisals, etc);üThe sale (real estate agent commissions, marketing and advertising, closing costs paid by the Seller); andüHolding the property (mortgage interest, utilities, taxes, insurance, etc.).These costs vary greatly for each buyer, but our experience shows that a Buy/Sell/Hold cost of 15% of ARV (0.15 times the ARV) is a safe number to use.If you wholesale the property, you may never purchase the property.In this event, all of these costs are passed on to your Investor Buyer.Therefore, you can subtract your additional B/S/H costs from the MAO formula.

Mace is easier to use and requires less accuracy to be effective. 

It's a little daunting never having estimated a rehab and trying to run the numbers when I'm not confident in my accuracy.

@James Hamling You said those who cited it with pinpoint accuracy.

Their representative accuracy depends on the 3rd party and what number they used (actual or ProForma) and involvement (seller/buyer or, god forbid, a broker).Having said that, in Portland proper, 5.5% on REAL numbers.  

For more context, the purpose of a CDA is to validate the appraisers value to ensure accuracy.

You'll need a least a dozen entries to get some accuracy to this.  

Some swear by Realflow, I've never been too impressed with the quality / accuracy of the data.

@Nicholas Morgan I'll be interested to hear about the accuracy of the phone numbers you got from ListSource.