wrong
"Does it make a movie "good" because you "like" it? No, it doesn't..." - Roger Ebert
there is so much wrong in this it is hard to fathom none of the actors objecting when they spoke the lines.
in no particular order: that wasn't a C note, that was more an A; some other people no longer in the picture are jem's mom, billie's partner since foster kids aren't usually granted to single adults, billie's and emmet's parents since they were probably the previous owners of the house...
if they needed money so badly; banks are usually somewfat flexible repayment, they could have a garage sale, all the electronic stuff could go on craig's list, banks could lend on her contract.; once they knew synergy worked they could find a team of nerds to reverse engineer it (cellphone companies would kill for a battery with a ten year lifespan)...