NNN Lease Option Periods

[Nathan W.]

About 11 years ago I purchased a NNN Ground Lease with a couple of friends.
6% CAP | Corp Backed National Tenant | 10% rent bumps every 5 years | High Income Zip Code

It had a fresh 15 year NNN lease in place when we purchased it and it also has three 5 year option periods for a total of 30 years. 
We knew this when we purchased the property but the current rent is low. Even after two 10% rent bumps they are paying about 64% their national average per store for rent. This store is in a great location and it does very well for them. 

In 4 years our initial term with them will be over. I'm assuming they will exercise their option periods and there is nothing we can do about it but I wanted to see if anyone had any ideas. Do NNN tenants ever renegotiate leases after their initial term is up? For example, if they wanted to remodel the property I could see them wanting to have a longer agreement in place. That's a long shot but I wanted to ask. @Joel Owens you seem like the NNN expert here. Any advice? THANKS! 

[Nathan W.]

@Joel Owens @Ronald Rohde @Brock Mogensen

I really appreciate the input. 
As I said, we knew what we were purchasing when we bought it. We didn't buy this as a value add. Our goal was to gain some cash flow and hold it long term. Unless something changes we plan on holding this property indefinitely.
It sounds like we are just going to have to wait it out. The good news is in 19 years we will have quite the rent bump to look forward to assuming this tenant stays put. 

Thanks again.