There is a website that we use "freecampsites.net" some are free one night or $5-10 might only be half dozen spaces some are county fairgrounds others small towns. Usally on the roads less traveled not the Interstates. Many are only for smaller rigs but we find enough for our 38ft 5er.
If you or the DW are 62 make sure you get your senior pass good for 1/2 price camping at NPs, USACE, USFS, BLM, USFWS.
Volunteering is also a way to cut exspenses. We volunteer 6-7 months a year. We only take volunteer positions that require 24hrs per person though we sometimes work more if it's a real enjoyable job. It still gives us 4 days a week to explore the area.
Another benefit of volunteering besides the provided campsite is that your biggest exspense of fuel is reduced.
If you don't mind walking "Amazon Camperforce" can put a good chunck of change in your pocket for 8-10 weeks of work pre Christmas. Besides the $'s they provide the campsite.
Dish for RVs may work better than Direct if you go with Sat TV. You pay by the month if you don't pay they shut it off. Want to start it up just pay for that month. Hot spot usage is paid for by the gigabite unless you have and unlimited acc and even then they usally throttle back your speed after so many gigs, so not necessarily the best bet for TV.
Verizon internet is your best bet or has been for national coverage. As we're happy with it the last eight years we have not checked the latest plans. I have a seperate Consumer Cellular phone for those rare spots without Verizon.
Good luck, see ya on the road.