4 and I still have to repair them frequently especially when following the herb/crop routes. It's a big pain in the bottom. Just lucky to have a huge energy tank or else I'd be eating all profit.
Two or three, usually unintentionally off Rube trades I haven't shifted yet, it is kinda annoying to have to pause for repair every two and a half beds though so two is probably about right.
Not hoes, but I do carry 4 picks. I hate stopping to repair while mining. So I understand the need to carry so many hoes. I don't have the patience to garden to the point the thing breaks so quickly.
Still waiting on an upgrade card that harvests/clears/waters/plants an entire bed in a click.
2 hoes. Enough to do my plots completely and I repair both when done. When I mined 3 picks. It not the repair as much as it is the interruption that is bothersome.
One. I like the mood boost, and it takes no time flat to repair. That said, I only have one herb and one vegetable garden because that's about as much gardening as I can stand. I completely get why hardcore gardeners benefit from some redundancy.
2-3 high class and 0-4 regular. With that and my other tools I have consumed so few drinks since the tool repair - mood upgrade and I never worry about having space for drinks anymore.
Rennie: I had to do some swapping at first but I don't anymore - I remember asking live help about it though. I think I reordered the way my hoes were to be a certain way and maybe that helped? Hmm, I wish I remembered more.
None. For some reason the High Class Hoe doesn't work for me. :( It's been like this since it was introduced. Both kevbob and Jono tried to fix the problem but no dice.
I have somewhere around 10. If you're wondering why it is because I cannot repair tools and have to beg my girlfriend or neighbor to repair them for me.
Oh and on a side note I'd do anything to get rid of the accursed "upgrade".