maybe a holding tank, but that is more like every 3 months. a properly functioning septic could go many years without pumping, Here in Wisconsin Law dictates it mist be pumped and inspected every 3 years, so it is important to know your local rules regarding septics. 

Your income will dictate how much of a property you can buy, and thus what you end up shopping for.

Maybe, but politics aside, market factors will dictate where an entrepreneur invests their money.