I have got one and I LOOOOOOVE it ...reliable, very safe to use and does everything I need it to do, though I don't do any baling (couldn't afford all the haymaking kit, and also I had lawntyres on mine so I can use it round the garden without ripping everything apart, but it makes it useless in wet weather)
Mine only has a front end loader, but I've got a trailer, topper, log splitter, post hole borer, pallet lifter and they are all really useful.
I wondered how much trouble the back excavtor thingy would be to put on and take off all the time, and if I had the money I would consider getting a seperate machine specifically to do that job...... but I don't
How about hiring an excavator for a week or two, or even paying someone. I am pretty sure that works out cheaper and easier for me to do..... but I deffo wouldn't be without the Kubota for all the other jobs