Thank you for interesting information. I agree, there are more and more companies and startups are using CRM solutions in their everyday life. And yes, if you want to achieve your goals, you can't afford to take random customer relationship management. So CRM is the best solution, I think. Recently, I've found interesting information about pros and cons of custom vs. ready-made CRM system https://joinsoft.com/blog/an-ultimate-comparison-of-custom-vs-off-the-shelf-crm-software-solutions/. May be it will be interesting for somebody else.