happy to be redirected to potentially a more suitable Stack Exchange Site for the following question, but thought this would be a good place to start. I have a business idea, and would like to carry out some customer validation before launching a website, marketing etc etc. Rather than asking people I know in this space "Are you interested in this, or would you pay for this", I would prefer to collect cold hard facts and offer 3 tiers of customer added value; Tier 1 would be free, Tier 2 would cost a small fee for a one off bespoke offering and Tier 3 would offer updates to the paid offering, as market data changes throughout the year.
I am currently thinking of launching a landing page using something like Mailchimp or Sendfox, where it would just collect a Customer Name and email address. This would generate a Welcome email with a PDF attached containing the free general info I am offering. The email would also then have Google Form links to Tier 2 and Tier 3 offerings if the customer would like more tailored information, and these Google Forms would have a PayPal payment link attached to them for an upfront payment (I see Payable Apps can support this). Just in case it sounds a small bit scammy, I will only be sending this to people who know and trust me - but I am also conscious that these same people would like to support me verbally, so a better measure of their interest would be if they are actually willing to part with their hard earned money for the services I am offering.
Is this a good way to do this? Is attaching PDFs (10 mB) to an auto-generated email easy and affordable (would prefer to stay in the lowest bracket of pricing for now as this is literally just a business validation exercise). Are there other/better ways to do this? For example, embedding the Google Form and Payment links on a landing page? Is it best to only ever have 1 link on a landing page, or could I have links to the 3 tiered offerings? Happy to hear any thoughts on this or other approaches I should research.