wheelbarrow here too, and like FiB they were inherited and not in A1 condition. Although I've finally completed the cart for Rosie (the shetland pony) so I may be moving up a bit, once I've figured out how to attach all the bits of harness to her and the cart.
I also sometimes have to remind myself that I'm doing this 'cos I want to - not as a business - so I shouldn't worry if I'm not spending every waking hour digging, weeding, fencing, etc. But then I see the bracken / thistles or something and think 'I'm sure that's spread since last year' and start worrying that I have to do something NOW.
You could get some wwoofers? This has been suggested to me, but I don't have anywhere decent to accommodate them unless they bring a tent, and my culinary skills are a bit thin (as I think you're expected to provide a meal).