Just be aware that there are other QA systems available than the SSQA.
The heavier (weight-wise) SSQA is primarily designed for a skid steer.![]()
And used as a factory item on Kubota tractors from the BX series on up. SSQA devices have more OEM and aftermarket choices for attachments than any other style. Choosing any other style for a B series Tractor would be a mistake.
The OP said "I'd like to be able to use QA Forks and a Grapple, if not other things in the future." The extent to which you really will use that desire is the extent to which you will or will not pay $1000 to get on board with the SSQA standard. Probably good time to shop around. For that much $ you might find something in an auction that you could swap parts off of it and resell ?