All I had was a lot of determination and a supportive girl friend (whom I am married to for 10 years as of this writing).One of the top banks in India gave me a pre-sanction letter that they will finance 80% of the property value or my eligibility amount, whichever is lower.

John has a $100,000 IRS Tax Lien.

For single family or small multifamily (up to 4 units) we use recently sold comparables (6 months of less) of similar properties within a mile radius or less, to determine value.  

I need to find the best way to determine accurate ARV's for my wholesale properties. 

And the IRS can look at an installment contract (which that is) and deem it a "sale" right up front and force him to pay taxes on the next gain.

I am a dedicated individual and determined. 

I believe that first, you need to determine a plan on what type of properties you collectively desire to invest in, and how.  

The first thing I'd do is to try to determine the after repair value of the property (ARV).

David has always been a big influence on my life with his unbend-able integrity and the determination he demonstrates on reaching his goals.

BP can definitely be a great resource, and since you are already in the game it might help you evaluate your current investments to determine how they are doing.Best of luck!