I don't have a ton of experience with tractors so I don't feel competent to make a judgement on what machines to recommend to you. However, in reading your original question, it appears that you may be open to the possibility of using part of the acreage for a more natural area for pollinators and wildlife. You don't indicate your location but I am assuming you get some cold months due to the fact you only expect to mow 7 months of the year. I have some fields at my place in Maine that used to be used for haying. Now, I leave those fields to wild flowers like goldenrod and milkweed. I bush hog the fields once a year after the wild flowers have died for the year. Cutting once a year keeps the trees and bushes from getting a start but provides forage for pollinators like bumble and honey bees, monarch butterflies, etc. that we need so badly. Cutting once a year would greatly reduce the number of hours needed on an annual basis for field maintenance and might allow you to get a smaller, less expensive machine. Personally, I think we should rethink the idea of having such huge expanses of perfectly manicured lawns. It may look nice but it is time and resource consuming and provides no usable habitat for the insects and animals that share this Earth with us.