Working with an advisor or counselor will help short-cut that process for you.Hope that helps a little.Continued success!

Attempting to assess an "average" discount for a cash offer is useless for individual circumstances.There are very few shortcuts to success.

My personal experience is that due to abuse of Land trusts by those who try to short cut everything, the title companies are simply declining to insure land trust transactions.

I'll show you a short cut, but it goes against what @Aaron Knoll recommended above.

There are no shortcuts!

A shady turnkey outfit selling something you've never seen in a market you've never been to, recommended by a shortcut secret sauce sales company that charged $40,000 for bad information is not the way to do things.  

Yes, I'm looking for a shortcut with pretty graphs and etc to help me convince my investors.

You have to put in the work no short cuts!

But they are first property managers, then brokers Shortcuts.

I'd also bet you'll find some shortcuts that will make the process easier, simpler or at least quicker than I've outlined.When it come to data mining, remember that what's bad is good!