Where are you located ?.
There are many smaller providers with fixed wireless that offer better services then 3g or LTE can offer.
For how far you can run a wire to the antenna it entirely depends on your cable. LMR400 or LMR600 would be what you want it should have very little loss at 850mhz and not much on PCS.
You will need to buy a proper crimp tool to put the connectors on tho. I recommend using an N connector and converting it to the type you need with an adapter.
You can use this calculator if you want. Just pop in the frequency you want to use and it will tell you how many DB you will lose.
With 100 feet of LMR400 you should only about 5.9DB of loss.
edit: If you want the highest possible signal you will want a YAGI or panel antenna. But signal is rarely the issue with 3g solutions.--