I'm on the "20 hours for ~$300 a month" plan. This is, FWIW, within striking distance of what you'd pay to hire a college graduate full time, but I find it easier to go through a company to avoid the headaches of that.
The VAs are pretty amenable to doing anything reasonable with a computer, which includes phone support. I haven't asked for it, both because I don't offer phone support for Bingo Card Creator and because the US workday would mean anyone offering it from the Philippines would have to be up very late at night, which I do not feel is a reasonable thing to ask of freelancers/employees under most circumstances.