I will go through an RMLO to do the paperwork to ensure accuracy and compliance, but am glad I can at least negotiate rates and terms with the buyer.

Given that your response was nothing like that, I have to assume that accuracy in facts was not your primary goal.

But expecting a 100% accuracy in these predictions is unrealistic when things as complex like climate or the human body is involved.

Does anyone have any input about their accuracy or knows of some other good appraisal sites?

Accuracy is relative in the world of DIY, however...  

Since IRR is a time relative calculation accurate estimates of time or the point in time influence the accuracy of the model.  

Of course there are many considerations that affect the value of the purchase contract such as the method/accuracy of estimated market value of the underlying house, term (time left to close), and perceived strength of the buyer; but regardless, both in theory and in practice, the assignable real estate purchase contract is a derivative that can be sold (i.e. assigned) in the open market to another party for a fee.Call OptionA call option is an agreement in which an investor pays someone else, a counterparty, for the right, but not the obligation, to buy something (i.e. underlying asset) at a specified price within a specific time period, or term.

Luckily it was a small list and I kept on making small changes then using the view results feature to confirm accuracy. 

A realtor has recently approached us with a solution to remove me from the deed (via quick claim deed process), at which point he suggests that the bank would then not consider my assets in determining eligibility for the short sale (we have an FHA loan*) and thus we'd have a better chance of executing one, since there's no way they'd deem her financial status alone, qualified to handle everything..Can anyone familiar with the short sale process, comment as to the accuracy of this?

When it comes to extra avenues of income such as parking or laundry, those are a little more difficult to verify with 100% accuracy.