-Tax records are a good start at analyzing appreciation on Oahu, but are slightly lacking in accuracy and recency.  

The same requirement for accuracy is added in the Property Code.

The same requirement for accuracy is added in the Property Code.

If anyone has a tried and true method to do this with some accuracy, I'd be forever grateful. 

I'm new and still unsure about the accuracy of my analysis.

Walk through with them and ask tons of questions and over time you'll learn the ropes to do it on your own with reasonable accuracy.

Expenses can usually be estimated to a relative degree of accuracy.  

You will also need to be able to estimate rehab costs with a good level of accuracy. 

I guess I could buy those database softwares that have access to absentee owners, foreclosures, pre-foreclosures, etc that some of the gurus sell but they are usually like $100 a month to access and I'm not sure who's would be the best to use in terms of accuracy and reliability. 

I found a first time homebuyer checklist which mentions that checking the accuracy of one's credit report is the first step to buying a house.I requested my credit report from all three bureaus and noticed some inaccurate information on each report (each report had difference inaccurate information).