48" Markham cost me $150, then $100 for shipping to CA.
I do some ground engagement work with my BX2200 and toothbar. It puts a real stress on the tractor. I have very hard adobe with morraine cemented into it. Even when I rototill first, it is a challenge digging with FEL and TB. I just don't know if a BX1500 would be very successful. In my own soil, I doubt it. You have less hp, less mass, smaller wheels. Perhaps in sandy loam that's already been plowed, you might fare better. I don't mean to rain on your parade, I'd just hate to see you spend the money and then be disappointed.