Honestly, 2-3 accounts isn't too much. There is no need to prioritize some proxies over other resources. Later on as you start to expand however, proxies will definitely become a priority. Basically, imo, a smarter thing would just be to wait and expand. A lot of people use 2-3 accounts per proxy anyway without much of an issue so I wouldn't worry about it too early.
Up to you, best of luck