Thanks again for all the advice. I did some shopping last fall and dropped a chunk of change on a tractor though sadly not orange as I originally intended. The more I read on the subject, the more I realized I had to go tier III and not IV. I also went a bit bigger than a B series as I originally was planning. Work has begun, among many other chores. I was able to dig a nice ditch with a middle buster and the loader, which handled the spring thaw and rains just fine. The field is no longer a swamp, and I've begun digging the many 3+ foot boulders out. A lot of work remaining, but looking forward to the day the field is a nice level lawn!