And if you do plan to stay there long term, you can identify who at the county administers the 457 plan and try to have a sit down with them to explain how the custodians are passing on the expense of running the plan to the employees.
It'd be nice if the person who selects the custodian has any clue what they are doing, but it is highly unlikely that a qualified individual is making that selection.
It is really cool that they have vanguard funds, and admiral shares in all those funds to boot. They also look like index funds, which typically have lower fees.
When I buy vanguard funds I'm going for low fees, right? So looking at one of the funds in the aggressive portfolio, VVIAX, expense ratio is .09%.
So vanguard buys the assets of the fund, tracks each member's contributions and withdrawals, offers up a slick easy-to-use interface, is compatible with things like turbotax, and does it all for 14.7% of the cost of this group. And with no additional $10 fee. For the cost of setting up an automatic payroll deduction to Vanguard, your county could dramatically cut the cost of the plan for the participants.
In your case, because you plan to take good advantage of it, as previous posters point out, it's not that big of a deal.
But imagine what someone first dabbling, who knows nothing, who invests $100 per paycheck. That's $2600 per year, of which 2.1% will be lost to fees, independent of the performance of the underlying funds.
Absurd.
There is nothing stopping you from writing your local county officials and letting them know how stupid this is. And once they find an affordable custodian, you can transfer your assets to the new vendor.