How do seasoned wholesalers determine accurate repair costs?

Is that accurate?

If it's 3 years or less or you don't mind the extra inputs and want more accurate numbers, use "XIRR."

You have to look at how much its costing you to hold it and the gamble of putting it back on the market and getting less.

I love when I take the time -- sometimes even do a bit of research -- to create a thoughtful, accurate answer and nobody, not even the poster, votes for it.

Any good tips for creating an accurate ARV?

Us, because we are the homeowners, or him, because he had a set of plans and didn't give an accurate estimate?

The more research and tools we have the more accurate we can all be :)

I have also shown properties that are just dry-walled before, and have been able to paint an accurate + attractive picture for the prospect of what they will look like finished, securing the deposits.

Not everything on Zillow is listed this is even more so on Craigslist; Redfin, Realtor.com, or an actual agent's drip will be far more accurate when looking at on market properties.