You sound mad. MMM wrote about Republic Wireless just the other day. Sounds like things have changed with RW since you last mentioned it, so I think it's at least worth looking into it.
Actually, no. I'm not mad. Also,
nothing has changed about their service
or my opinion of RW post MMM post other than a fancier phone. I thought it was a bad idea before, and I
still think it's a bad idea. I'm just taking a much harder line on it out of necessity because so many more people are asking about it now and a more subtle approach is clearly no longer effective.
Let me give you a list of five major failure points for so many MVNOs in this country to chew on:
1) They take a proprietary approach.
2) They
have to carry inventory.
3) They charge less than is sustainable long-term.
4) They're relatively short-lived on the market.
5) The service is built around a gimmick.
As for your other points?
Yes, I agree that you have other people that you must take consideration with.
Yes, if you're going to fall for the idea that you actually need "unlimited" service, the T-Mobile plan would be equally priced for a two phone household to regular "unlimited" MVNO packages set up the same way.
No, even if you work from home, you shouldn't let your employer leash you and make you pay for the collar and leash. If you work from home anyway, why use a cellphone at all? Use a VoIP account instead. Less radiation exposure, cheaper, just as reliable. If you're stuck footing the bill telecommuting, just set up a VOIPo account on month-to-month or something and take the tax break.