Based on your needs, a VPS (Virtual Private Server) seems like the best fit. It offers more control and stability than shared hosting while being more affordable than a dedicated server. Since you’re not a server expert, look for a managed VPS with good support for ASP.NET, MySQL, and MS-SQL. This will reduce shared hosting issues while letting you manage custom accounts. Ensure the provider supports ASP COM components for mail/image handling. Upgrade to dedicated later if traffic grows.