In this case, it is not.It's about intelligence and data, not "patience and Persistence".If you need to "follow up" on people, it means you are not reaching motivated sellers.

Finish (find money i.e, renegotiate with lender, find a partner, HELOC etc.)Let your gut be guided by data and then move forward decisively! 

I once downloaded and analyzed Zillow data to find markets with attractive cap rates...

What data do you gather and what tools do you use to optimize this process?

Is anyone aware of a good data sheet that provides some basis for OpEx?

We are still dealing with national supply chain issues on certain materials which has driven up the cost of almost everything.

Consider different selling options (traditional sale, rental, or auction) based on market conditions.Tools that may help: QuickBooks for budgeting and expense tracking.Zillow or Redfin for real-time market data Asana or Trello to track the progress 

We have a model-driven forecast for home price appreciation in the top 381 metros in the country, and we have two very out-of-consensus views as a result.

The HML as you know never leave their office.. they collect data just like a bank does order the appraisal and all that jazz we dont do any of it.. we will run criminal though we dont want to be funding any bad actors or dead beats.

Where is the data behind their projections?