I found this:
<table><tr><td>Purchase DC<td> Item Cost
<tr><td> 2 <td> $5
<tr><td>15 <td> $500
<tr><td> 20 <td> $2,000
<tr><td> 30 <td> $35,000
<tr><td>40 <td> $650,000
<tr><td>50 <td> $12,000,000
<tr><td> 60 <td> $200,000,000
<tr><td>70 <td> $3,500,000,000
<tr><td> 80 <td> $65,000,000,000</table>
So... let's say a Wealth Check of 25. Whatever you roll is the amount the bank allows you to transfer. Anything more leads to bureaucratic complications and cockblocking.