I'm not going to have great news for you.
Let's start with the simplest first by getting you migrated to a new MVNO that you existing phone works with so you at least have phone service until everything can get fully sorted out. Since you're coming off Verizon and you know it works, find out what your average usage looks like month to month, and
find the right Selectel plan to meet that need. That should give you the exact same Verizon coverage you're used to with voice and SMS roaming, and a bit of data to play with. Their $30 plan provides 1500 minutes, unlimited texting and 1GB of data, and they have plans with "unlimited" calling and more data at higher price points.
For home internet access, it really depends on what sort of T-Mobile coverage you actually have. Of the big four, T-Mobile's data prices are the cheapest (especially if you stream a lot of video from any of their
BingeOn providers, which won't interfere or eat up any of your fixed data plan, but they will de-prioritize your data usage on the network after about 25GB of data in a month IIRC), and with Verizon's being the most expensive; and buying in bulk with data only plans, you're going to need to go to the carriers directly, with their prepaid mobile data plans being the better deal, unless you enjoy being under the thumb of contracts. But it's not going to be cheap. Also, it's important to know what sort of coverage T-Mobile has in your area, as well, as many rural areas still only get 2G 150kbps coverage. If you're unlucky enough to be in one of those locations, your choice will be made for you.
T-Mobile's prepaid data only plans.Verizon's prepaid data only plans.If Verizon's LTE service really is all you can work with, however, bite the bullet and go postpaid, but bring your own devices (do one line and a mobile data hotspot). Their mobile data is considerably cheaper this way.
There's LEO satellite internet services such as WildBlue, Exede, and Hughsnet, but their prices aren't much more competitive than mobile data with far more expensive equipment and even longer contracts, and much higher network latency.
No matter how you slice it, though... it's not going to be cheap. This is the cost of rural living if you want to stay connected to civilization.