Everyone has their own requirements, but I thought I would share what I use for a business solution.
The only way I can go full time and still do my work as a database administrator, sometimes on call, is to have redundant systems to get to the Internet. My provider for cell and data is AT&T and has been since DSL was introduced. I have had no issues that were not self inflicted.
I have a desktop with a wireless adapter and two monitors, and a laptop with an onboard wireless adapter. Either of those will work fine in a location with an available wifi connection. I have stopped in McDonald?s, ate my fish sandwich, and worked from the coach for an hour, then moved on. That fact that most McDonald?s and most Starbuck?s (for the bride) are AT&T hot spots does not hurt, either.
I also have a D-Link wireless USB adapter ($40) with a moveable base that will provide a much stronger signal than either of the onboard adapters and I use that if the signal is weak where I am parked.
Then, I have an AT&T USB Connect Lightning cell modem on their data plan, 5GB cap. One of the things I like about the cell modem is rolling down the road and using the laptop, normally without dropout problems. I have used the cell modem for two weeks in a row, full time, for business, and was on pace to use the 5GB. Streaming video from Netflix was the culprit, though. AT&T claims 98% of their users use less than 3GB a month.
Christi has her iPhone and has the old data plan which did not have a cap and then we have unlimited voice on both cell phones. So she can hit the ?net with a third solution.
We have found numerous public places with public wifi access (do your homework) and a solid fallback position is a public library.
Overkill? Maybe, and I am sure there are remote areas where I will have a problem, but that?s why we are on wheels. We will move to where I can work, and then play wherever.
I would agree it is not the lowest budget solution you can use, but it solves my problem of working on the road, and it?s not complicated. Your mileage may vary.