Sorry to be so blunt but putting ones family in harms way strides a nerve with me. If you were alone....have at it.
You were not prepared to make this move....EOS.
KD0ute, if you have decided on a plow for your truck and are just looking at a mower then the kubota z725 or z726 would be great options as well. They are mid mount ztr mowers, but are heavy duty and could handle your acrage with ease. Would be in the $8k range as well. You may also want to check out the snapper pro s200xt. It will run in the $9k range. Great mower. My father owns one that he uses to mow about 9 acres with. I don't know if you have horses, but in case you do exmark was offering an equine discount on their mowers. The laser z is an excellent mower as well.
Went to the GH and Exmark dealer last night and I enjoyed both the 727K and the Laser Z. Our ground is smooth enough for 11 mph so that isn't a factor, but I felt the GH was a smoother ride where the dealer was. Both cut well. I am going to the Kubota dealer tonight to test drive different machines and can hopefully make a decision by the end of next week. The exmarck and GH didn't have any used products so they would be a new buy. I like the idea behind the diesel kubota engine over the kawasaki's and kohler's, but I am not sure if it is worth the price increase.
You were not prepared to make this move....EOS.