Come on... what time premium? It's the 4 year 12 call? The premium in that is nothing compared to the level of the stock... less than a dollar, and about one dollar of interest component. So on the total value of about 300 it's not something you should worry about. The stock moves up and down in 2 minutes more than 2 dollars. You've got 250 options with a value of about 75k correct? So 500 dollars isn't exactly something I would worry about.
You're basically long NFLX at almost delta 100. So that's basically stock.
What's your aim? You don't want to be long Netflix anymore?
Any hedge in an account that's not looking at those employee options will be needing a decent amount of margin for you to put up, since you will likely want to short sell NFLX, or sell the synthetic by selling ATM call and buying ATM put. A decent rise in Netflix will erode your cushion and you will need to put down more margin to maintain the position... eventually it's possible that you will be liquidated... of course you can always at that point decid to exercise those options... but it's not a good situation to be in. Also locks up cash.
Just buying puts... you will pay a lot in premium... a lot more than you would be willing. 1yr ATM put is >15% of the spot, $50. So that's steep.... Adds up if you do that every year.
A collar, sell OTM call and buy OTM put... will leave you with some risk downwards. But also, again, you will need to put up margin... more and more when NFLX rises. Cash drain, only do that if you can hold your breath and sell those employee options when it's going up.
With these situations... if it goes up and you have margin requirements, if it goes fast... you might not have time to put cash in the account and if you get liquidated at a top it's a shit deal.
I seriously doubt any bank is going to lend you the money to do any derivatives trade, based on your employee options. You're not exactly a high net worth client, what's the total value? 250x300=75k? The compliance/paperwork/redtape involved isn't worth it for a bank. And the % you will likely pay means you're shooting yourself in the foot.
What's the tax you're looking at? How much do you save if you wait and how long to wait for that?