Cheap Eats walking distance from Central Beach area

I will be staying near the W Fort Lauderdale (at a much cheaper place!). It looks like a lot of the restaurants are on the other side of the intercoastal waterway isles. Is there anything walking distance that is inexpensive, like tacos, etc?

Or maybe a bike rental to get over to where Flannigan's is?

We're on a tight budget, just trying to have a lot of beach time, but we'll need to eat sometimes lol Looking for one big cheap meal a day.

We're from the northeast (there's still snow where I live!) and we don't mind a lot of walking, but 45 mins in each direction is a bit much.

Thanks in advance for your help.