Looking for a VPS with full root access to install custom applications.
3 vCPUs, 6 GB RAM, 120 GB SSD. CentOS preferred.
Can I trust Greenwebpage.com vps hosting? Other good vps hosts?
Can you also assist with initial setup?

Reliable 24/7 customer support via live chat, phone, or email is essential. Test their response time before committing.
You can give Regvps.com Linux VPS a try. The high-performance SSD storage significantly improves website loading times.
My website has never been more stable! The one-click installer for applications makes launching new projects incredibly easy.

The VPS solutions from hostpro.com use KVM, giving full virtualization and OS flexibility. NVMe-powered storage keeps read/write latency low. Backups are performed daily and stored for a 30-day period, covering various recovery scenarios. Infrastructure in Tampa, Amsterdam, and Warsaw allows better geographic distribution. Around-the-clock technical support maintains operational stability.

VPS plans from hostingsource.com and inet.ws are worth every cent you pay for their services.
Their servers are fully-redundant, scalable and flexible, control panel is usable and has web master-friendly interface and prices are not high.