In what situations should one purchase multiple VPSes to host multiple websites? For instance, renting three VPSes with 1GB RAM 3 times vs renting one VPS with 3GB RAM?
The problem I am currently having with multiple VPSes is that I have to setup a lot of configurations on each, and as they generally all need email (PostFix), LAMP and the same Apache configurations, I'm finding it very frustrating to use.
Therefore the top priority is going to be performance and ease of maintainance.
Which path shall I take? I appreciate all opinions with points backed up.