Thanks for the reply Joram,
That's interesting to know. I haven't given much thought to potions before, because I rarely used them, until the latter parts of the game. From using my gimped char build, I have found an interest in them from early on, and it got me to thinking about the gold. I have always been careful with my spending before the tower, in order to have the 42K to fully upgrade my runners from the start. This last time I had 50K, and that was mainly because I didn't use any weapons, and very little armor. I will keep this in mind for future playthrougs.