A 140 isn't enough horsepower to do meaningful work. I'd get at least 30 horse and feel better with 40. Regardless of horsepower it can do more work with disc type turning plow compared to moldboard. Two things make a lot of difference when choosing a tractor. Whether you plan to use a rotary mower and if you need the mower on 3 point apposed to drag. If you can live without 3 point AND you know how to judge condition of tractors Farmall H,Super H,M and Super M are workhorses that sell for less than half what their 3 point counterparts do. My first choice of vintage tractors for small acreage are 4 cylinder 2000 and 4000 Ford. Unless you have mechanical experience with diesels and plan doing your own repair,stay away from diesel that isn't in top condition.