Does that mean the boat can't be more than $49,500?
That's a pretty tall order with some fairly specific 'extras' that will be either difficult to find, or, if present, old, outdated and perhaps marginally functional. Water makers and SSB are significant cost items..
I really think you're best off to shop somewhere where someone's dreams have been dashed and they are desperate to sell a (hopefully well-equipped) boat in some remote locale.
I wish you luck but I think your budget's a bit skinny....