Actually if the power went out you would have beter luck with a larger tank. The larger volume of water would hold temperature longer, and larger tanks are more forgiving in regards to water parameters.
An empty 55 weighs 75 pounds, look around you & guess how many other pieces of furniture weigh 75 pounds or more. A 55 isn't that hard to relocate, I've done it twice. The other person's experience with a 55 has so many things that could be different from a 10. Filtration, stocking, mainainance, the list is endless.
The plec needs a larger tank, you wouldn't keep a german sheperd in a closet. The plec in a small tank is like that, it needs more room. As far as transportation, talk to a neighbor, see if you can bum a ride, especially if you spring for gas. Worst case, take the bus there & a cab back.
It just amazes me how some adults can be against something like aquatics with so much other nasty crap out there. You could be into gangs, drugs, who knows what. I'm sure parents who's kids are into that sh!t would be glad to buy them several 55 gallon tanks as an alternative.
Keeping that in mind tell her she's right. Then start looking at motorcycles online. Talk about saving money for a drum set & starting a rock band. Talk about dying your hair purple & getting it spiked. Look at firearms online, then tell her you are taking the bus to the local gun shop. Find things she dislikes more than a larger tank, & start acting interested in them. The 55 will start looking real tame.
Tolak