As you said, you want to run vbulletin forum software on this VPN hosting server. So personally I would recommend you to go with DigitalOcean because there are many things that you should consider before start community forum.
- Community forum should be fast and their web pages speed approx 2-3
sec or less not more.
- Prices should be affordable because beginner can not bear VPN server prices instantly.
- Hosting should be trustworthy and reliable.
- 99.99% Uptime (Compulsory).
- Technical support 24/7/365.
- Money back guarantee shows company seniority and built consumer interest/satisfaction.
No doubt HostGator is good but their prices are too costly unlike Digital Ocean have affordable prices with premium quality service. Digital Ocean says,
If they fail in deliver to you a better service then they will return your full amount back.
We already discussed on Digital Ocean $10/month VPN server plan, which is a perfect solution for initial community forum.
Hopefully, the answered is your question.