Both areas the 1 Acre lot is a residential lawn. Just need a inexpensive mower for this job. Not sure what size to get.Welcome! Lots of guys really favor the zero turn mowers - for lawn mowing. What are you mowing, how often, how smooth is the land?
For the 20 Acre lot as little as possible. Folks would be volunteering their time to cut it so time would be of the essence.Welcome to the forum.
How much time do you have that you want to spend mowing?