I would have to say that you could NOT make a worse decision.
The low end inflatable kayaks are junk. This includes Intek, Coleman, and the bottom end Sea Eagle, as well as any store brands... They are not durable at all... They will get you into a place that they may not be able to get you out of.... Worst possible scenario.
My knowledge comes from buying and selling a few dozen of these kayaks and rafts from a store return auction. I see popped seams, tears, etc.
Throw in boat wakes, oyster shells, and other issues for the intercoastal.... You're literally taking your life into your hands.
I'm not picking on inflatable kayaks in general.... Some very nice and sturdy ones are made. But you specified "cheap" and the good quality ones will cost the same or more than conventional kayaks. The low quality cheaper ones are not worth owning, particularly in the environment you describe.
I once used a $30 inflatable mattress to get me out on the water to fish. It worked for about an hour before being punctured by a submerged log. I made it back to shore but it was an adventure. I wouldn't advise you to go this route. Even a $200 sun dolphin kayak from Walmart will suit you better.
hate to keep piling on, but I had a decent one that had an air bladder inside and a really tough exterior. Not as much concern about popping, but hard to fight any wind or current. Used it once in the sound. No disaster, just dead tired after slogging around.