If you wander out to the more remote parts of the Nebraska cornfields, then Verizon coverage is going to be your go-to, with or without roaming support. AT&T coverage isn't as bad as it used to be, and a strong second tier if you stay close to the more populous regions, but check coverage maps.
There really aren't too many good
Verizon MVNOs. My primary go-to recommendation is Selectel
, but your current price markers (or non-discounted future) for the service level you're after (approximately 2GB per smartyphone, four lines, effectively "unlimited" talk and text on all four lines), isn't going to be a great savings over what you're about to pay (maybe a couple bucks per line). Where the real savings would happen with Selectel is if you learned to use less mobile data and paid for what you actually needed, though this approach will be of benefit for financial savings with any carrier. If you could get by with 1GB of data and 1500 minutes (read 25 hours) of talk time per line using Selectel, you're now down to $30/month per line.
Obviously, knowing what you actually use in the way of your average amount of minutes, texts, and MB of data per line can go a long way towards being able to save you money as you can simply pay for what you need with any carrier. Doubly so with data. Most people don't need near as much mobile data as they think so long as they plan ahead, restrict mobile data access to important communications services, use their phone storage wisely, and use their phone as a tool and not as a boredom alleviating entertainment toy by consuming gobs of streaming music or video. Doing this allows you to pay for what you need, and sometimes just paying for what you need
can be a lot cheaper than buying into the "unlimited" fallacy - especially if you need Verizon coverage.
Additionally, there's Puppy Wireless
which has a few interesting Verizon LTE plan options at the $20-40 range. And finally, there's the Boom Mobile
Verizon plans. Boom's a newer carrier, their plan listings and website can get a bit confusing given they offer service on all four carriers, but they've been around for over a year at this point, their terms are relatively inoffensive, and their support track record has been reasonable. I haven't added them to the guide yet, but I can't find much at this point to object too heavily over beyond age of the company itself and knowing how hard it is to keep a Verizon MVNO account active past the 18 month mark which they haven't reached yet (it's a subscriber base size thing), and there's been some real weirdness going on with a lot of Verizon MVNOs in general the past month. They have some of the most cost effective Verizon MVNO plans available, even if they don't support multi-line pricing discounts on Verizon, but given the higher risk caveats versus Selectel and Puppy you can hopefully see why I've left them for last. That said, their $25/month LTE plan offers "unlimited" talk and text with 1GB of data, and their $30/month LTE plan offers "unlimited" talk and text with 2GB of data.
Do remember that none of these Verizon MVNOs offer off-network roaming to Sprint or US Cellular's networks... not that you live in a part of the country where that might prove important.... but that just means a loss of regular coverage. You'll still be able to dial 911 and have it connect if a compatible CDMA/LTE tower is close enough to ping, no matter the owner.
There's a couple other more well known Verizon MVNO brands owned by Carlos Slim, but support isn't great, and the terms of service are gnarly. Please do what you can to try to support the few decent MVNO wholesalers that are
available if you go MVNO over staying with Verizon directly.