He should have gotten the $300 back when Quinn blackmailed Sue into giving up one of the cheerleader pages for the Glee Club. Schuester also claims to have made a profit from fixing up the old sports car and selling in. Plus, with no baby stuff to save for anymore, they should have much less financial burden. What kind of mattress did they get? It didn't look like one of those $2000 Tempurpedic ones, just a regular one. Can't be more than $1,000 can it? Why not another "brownie" bake sale to pay for the mattress? Everyone just gives up and says that's it.
And didn't the commercial say that the Mattress Store offers low interest financing?