this is brilliant (and great name). The true value of a salesorce/hubspot killer CRM is integrations. Most people use hubspot or salesforce just as a database and use a bunch of other tools.

If you want to do one thing - focus on integrations first and UI second. Let your integration architecture inform your UI/metadata driven architecture.

the good thing is - this is an easy step into monetization. Anyone would pay the same cost as hubspot for an opensource alternative...but with the same integrations. Managing the data pipelines is the hard part.