Ed,
You don't need to worry about shipping costs, there are lots of local dealers you can visit to work a deal from. Scholten's is just up the road from you and they have new and used finish mowers like this
Rankin RFM2072 that seems reasonably priced. I like the rear discharge to spread the clippings better and 6' will be just outside your tires so you can mow close to objects.
My 33D is just about the same as your 30 IRT weight (without the BH) and the R-4 tires will make marks in our ground this time of year. I use mine to move firewood up to the porch and the ground looks a llittle distressed right now. But come spring I can assure you it seems to grow at least 1" per hour. :shocked: And the Dandelions grow even faster.