Meeplesburg design changes

So here are some of the changes to Meeplesburg I play tested last Monday

• Play testers liked incremental cost of getting a Mason disc ($3, $4, $5 and $6)
• Limited spaces for Masons for the Action spots made players add Tenants early in the game. (2 spots for Bridges per round, 3 spots for Monuments per round, 3 spots for Tenants per round)

Potential Issue:
The following units now generate income: Building tiles, wall segments, Monuments (no more cubes now), Bridges and Tenants. So this means there is more money in the game. A player with 4 building tiles, 2 walls and a Monument could make $7 with a single Income Generation action. A new player--Jerome?--ended the game with $25 which got him 5 victory points. So my concern is perhaps there is now too much money in the game, at least at the end. I might cut Tenants and Bridges from list.

Thoughts?

What I have left was a challenge from Paul Saxberg to make the game playable with 2 players, and I figure I might as well make sure it is playable with 5 players, since the 2-5 Players is the sweet spot for Euros.

To make it a 2 player game I would have to make the game boards double-sided. In a 2 player version the players would remove all the yellow meeples from the game. 

• So the City Map board would have no yellow worker row or column, making the board grid 4x4 instead of 5x5. 
• There would be 12 squares for placing buildings and 4 river spaces. 
• The players would also remove all the building cards/tiles with yellow meeples on them: 10. This would leave 15 buildings/tiles for a 2 player game. 
• 3 Building cards would be available each round instead of 5.
• 8 Meeples would be drawn from the bag each round, so each player would have 4 workers to use.
• One less Mason spot for each action space: 1 spot for Bridges per round, 2 spots for Monuments per round, 2 spots for Tenants per round
• One less Mason added per round (Round 1: 3, Round 2: 6, Round 3: 9)

I feel I am getting close to a finalized designed game.

The question is about having too much money in the game. At the end of the game every $5 is worth 1 VP, and the new player ended up with $25 at the end of the game, which made him 5 VP. Money used for the following in the game:

• To place a building on the city map board costs $1, but if it is adjacent to one of your own properties then it cost $1 for every building in the group, including the new one.
• To purchase a building it requires 1 worker and $1
• To use a Mason it starts at $3, then $4 for the next one, then $5 and finally $6
I was worried money would be tight in the game, but for some players it wasn't

I myself tried to construct a building I needed and put it on the board, but then I discovered I had no money to place it. So I spent that turn generating income, at which point the next player bought the building I wanted.

So how do you find the right balance of money in a game? Is it based on how much is left at the end of the game? Or players complaining about not having enough money, or complaining that they don't have enough actions to spend their money on?