Lots of good tractors in that range and almost all would be fine for use in a small vegetable patch. With just 1-2 acres I'd go for the 20ish
HP myself as those tractors have slightly smaller frames which could be handy. 4 foot implements would be reasonable and are both cheaper and easier to store than five or six foot implements used on bigger machines. Kubota B series is very popular though the B7800 is no longer made and is perhaps a tad big for what you are doing. There are B series under 30hp too. JD and NH make nice tractors in that range as do Kioti, Bobcat (rebadged Kioti), Mahindra, TYM and MF too. Stay away from the subcompacts if you value ground clearance and ability to use Cat 1 implements but there are certainly people who do a fine job in small gardens with subcompacts too. You'll need to decide if you want an
HST transmission which will cull the list a bit. You should also just visit your local tractor dealers regardless of the color of the machines on their lot. Big bonus points for a good dealership.