Let me see, from what I understand, this is the difference. Correct me, everyone, if I am wrong or if you have anything to add.
Hobby Farmer: Someone who 1) does not make their living farming. Keeps cattle pets, has names for his or her cattle. 2) May or may not have a nice place, new home, Ford F350 4 door King Ranch edition truck with no dents, pipe fence, a new tractor, new barns and equipment that he may or may not use and may or may not have any interest in using. 3) Someone who bought a lot of land at extravagent prices, bought all of the above, along with some cattle, horses, alpacas... "just for fun". 4) can afford to have a man run the place.
Part Time Farmer: Someone who farms or ranches part of the time and works in town the rest of the time in order to be able to afford to farm part of the time.
Hobby farmers buy hay. Part time farmers grow their own and hope they get two good cuttings.
Hobby farmers shop at tractor supply.
Part time farmers like to use the local co-op to support their community, but will go where they need to go to get the best price or to find what they need on Sunday. Or better yet, they will improvise or weld it themselves.
Then there's me and others like me. I bought some bottle calves at the sale barn to have something to do. I have a few acres and a couple of barns. I have to borrow a trailer because it makes no sense for me to own one. I buy hay, but hate to do it. I have posted some really stupid questions. I have laughed at myself when I got the answers and no one really made fun of me. I don't know where I fit in. Got no hat!
Please feel free to add, detract, or otherwise attack my views. Remember, I learned them here. ;-)
Do a search. You will find many interesting arguments.