If your way to make wealth matter is to have living expenses, taxes, etc... you've failed.
That's just a way of taking away wealth. If you give the players money, then take it away, you aren't doing anything interesting.
To make wealth matter, you need several things the players can spend it on, and they have to make a hard choice between them.
"I could buy this +1 sword, or have this alchemist makes potions of healing for me for a year".
Once you have that choice, then wealth matters.
That's just a way of taking away wealth. If you give the players money, then take it away, you aren't doing anything interesting.
To make wealth matter, you need several things the players can spend it on, and they have to make a hard choice between them.
"I could buy this +1 sword, or have this alchemist makes potions of healing for me for a year".
Once you have that choice, then wealth matters.