Yeah, single bed here too with rails. I couldn't justify getting a toddler bed. I just made sure that the kids could climb up and down safely.

We got bunk beds which separate into two singles, they're solid wood slat beds and I think the bunks cost about $800 and then we paid about $270 for each mattress.

I think you can get fairly cheap beds. If you just want a very simple bed they're not too expensive. But it's a one off purchase really. If you get a toddler bed now, you still have to fork out for a single one day anyway.