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.