For gloves, I strongly suggest Pogies. If you have not seen them, they are like oven mitts that go over your paddle shaft. You stick your hands inside and hold the paddle shaft in your bare hands (or with your summer gloves if you prefer). I have used these in 30 degree weather and my hands typically get too warm and need to come out for a breather every so often. The main benefit, besides great warmth is that you don’t need to worry about bulk or thick gloves making it difficult to hold your paddle. Also, it is easy to get your hands in and out and once out, you have full finger mobility, unlike with heavy and thick gloves. Also, you never have to worry about dropping a Pogie when you pull your hand out as it stays attached to your paddle.
If you want a new dry suit, shop around on the internet. There are usually some decent sales for the lower end suits in the $500 to $600 range. Also, you may want to consider a semi-dry suit, i.e., a suit with a neoprene neck seal rather than latex. As long as you don’t expect to do a lot of rolling or otherwise submerging your head and neck, these work just as well as full dry suits, but many people find the neoprene neck gaskets much more comfortable than latex. Also, semi-dry suits tend to be a bit cheaper.
Finally, give some thought to what you will layer under the dry suit as most dry suits are just waterproof layers with little to no insulation. Typically, light to middle weight wool or fleece pants and shirts provide very good insulation down to 45 degree water temperatures. For colder water, heavier layering garments may be necessary. The key is to wear materials that don’t absorb water (e.g., never wear cotton) as even the best dry suit can leak if the gaskets are not perfect. Also fleece and wool will help sweat pass through and out of the dry suit while cotton would hold the sweat.
Many dry suits include built-in booties that are made of the same waterproof material as the lining of the rest of the suit. You want a fairly thick and robust neoprene boot on top of this to protect the bootie. For your use, any 3mm neoprene booties will likely be sufficient.
Good luck and enjoy.