About 60 dollars
About 50 , however Sheilia is correct. get a full twin is very easy to roll off with , hopefully u wont roll off into a 🍕 during the night
Don't bother with the twin get a full size. It's more comfortable. Put a sheet of plywood under . And you will be good.
Blow up beds? If you are referring to air mattress, they run from $20 to $100 based on their comfort level. Some of the higher ends come with self inflation and deflation. Good luck
Last one i bought was just under 30$ but there is several options there to chose from
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