Is this method considered against the law? 

However, she was highly demanding and I didn’t appreciate her negotiation method by intimidation.

I am also exploring the possibility of developing vacant land. 

Same issue with a Registered Agent.Either method are fairly inexpensive and very easy to do yourself.  

Also did not know a possible payment method could be so polarizing.

Also, we have a team of fifteen employees now, with processes and systems to scale.Given my track record and ambitious goals, I'm exploring ways to attract investors for fix-and-flip projects and rental property investments.

Or would you suggest other methods to gather data and insights before committing to a subscription?

Quote from @Brian Bowen: Is there a good free method or resource to find owner contact information?  

Exploring wholesaling and land investing is a great way to break into the industry, and your focus on value-adding strategies and modular housing shows you’re thinking creatively about how to address market needs.Your entrepreneurial background in auto detailing will definitely serve you well in real estate, especially with your attention to detail and perseverance.

Some services provide numbers that have been involved in litigation, so those are the ones you should definitely remove from your lists.If your lists are hyper-focused, you might manage to get by with fewer removals from the DNC list.There are also non-DNC-related methods available, such as direct mail and digital marketing.