We are generally on the road for 30 days at a time. Our cell phones are thru T-mobile's military plan and wanted a different carrier for our wifi. I bought a used Netgear Nighthawk on FB, added an Omni MIMO antenna with TS-9 connectors and mounted it on a 6'-12" painter's pole. It can be attached to the ladder or use HF suction cups to stick it on the slide. Simply run the wires thru the slide seal and plug the Nighthawk into power and we have up to 20 connections. Weboost would be a better permanent solution but, we are into this setup for $250 initial and $65 monthly.

Our setup:
ATT prepaid Unlimited Plan $65 a month https://www.att.com/buy/wireless/prepaid/plandetails
Netgear Nighthawk hotspot https://smile.amazon.com/Netgear-Nig...098WG1ZMR?th=1
Painter's pole https://www.lowes.com/pd/6-ft-to-12-...ole/1001314958
MIMO Omni Ts-9 antenna https://smile.amazon.com/10-12dBi-Ex...s%2C98&sr=1-19