Yeah just find a used one that's bare Bones. There's not a lot that can go wrong with them unless they're rusted out. We had a couple growing up, and the best was The Coonass 2 my stepdad bought from his boss when we lived in New Orleans and he worked for NASA. I don't know what the brand was, this was back in the 80s, but it was a solid boat. Caught a lot of fish out of that boat over the years growing up. Used to do in short Marsh fishing all the time. Had a steering column installed and everything, maybe a 14-footer.
I think he traded it or sold it for a bigger boat though so the family could go out on the water easier, despite the fact we pack mom my sister and myself and him in on the weekends and tour around bayous.
You can always put decking and installed seat mounts and stuff on the benches further down the road. I guess your biggest expense would just be getting a tiller steer motor, but it's not like you need anything heavy duty to push something that small. Hopefully it has a decent trailer that's not rusted out.
Other thing you could possibly look for is a Carolina skiff that's fiberglass. We've had one of those too and they're great, there's a lot of stuff you can do to upgrade them.
I've no clue what they cost now but what times being tough maybe people are getting rid of them because they're hard up for money. I'd honestly look for a little 14-footer though that should be plenty big for you and another person to fish comfortably, and have ample storage for coolers gas tanks and gear.