It's interesting. "The surveys are taken through the internet, so only internet users will be able to respond to them, and responses will be more bias towards more frequent internet users." How will you verify the person taking the survey is "high net worth investors"? And also will explanation of the survey results be done by just one person or, will it be with counter arguments from different experts?
My survey provider has information on the respondents to determine their household income. I'm going to use their audience targeting to target households with high income. On top of that I use my screening question to screen out respondents with less then 100k in financial assets. Most people are honest on surveys, if I ask my survey provider they will probably say at least 95% honesty.
The explanation of the surveys will be done by me for now, but if I get a lot of subscribers I will hire, or team up with experts.