My experience of rural areas is that few are actual farmers. After all, farming has largely consolidated and become automated. Most country people just don't want a city lifestyle. They might have some of the accoutrements of a farmer and have added lifestyle (enjoyable/fulfilling) overhead and significant attitude (independence & sometimes xenophobia) for themselves, but it's a lifestyle choice. Therefore most don't have a welder (though they probably know someone who has one).

Definitely depends. Most my neighbors in the country have 100 amp service and they are sucking that dry already now that they have heated water and electric HVAC. Many more run solar only since it can cost $30K+ for a half mile extension.