Upgrading to expandable travel trailer from pop up

first, there's no 11' Starlight hybrid TT.
there's a Starcraft but no one makes an 11' hybrid TT.

i'd suggest walking away from this trailer.

but you need to post the brand and correct model number.
and what will you be towing with?

if it is a hybrid, if there's that much wrong inside, no telling what the bunk end doors are like.

did you check the condition of the bunk end doors, the seals and the door frames?