Just for clarification, leaving the group will cause your maze to be lost.
the maze is the least of your worries as most maps which spawn are junk.
I would also have suggested you just make a new character rather than to reroll. Keep a level 25 hanging around as lets arguably say you get to level 50, and the best weapon which has dropped is a level 20,you can then continue with the level 25 char and head to level 50 with that one.
Proficiency adds pretty much nothing until about 10% where you'll then still not notice it seeing it's a slow progression.
All the best, not sure if your challenge is to get without buying/selling or to just simply start from 0 fg.
If you're willing to use the market this topic may be of interest:
http://forums.d2jsp.org/topic.php?t=60608527&f=273&p=551490694the most likely drop for you to find is a 6 stat tier 3 item.
When you get to level 20, level 20+ items with no stats (also known as whites/wellables) can drop and sell for 1+ fg each, just compare with the market for items level 20 or higher with magic level NORMAL to NORMAL and copy other peoples prices,