Woah! High School! Very young ka pala!
Well the usual prices for that particular model is usually between 1-1.2K. Pwede ka naman siguro tumawad sa Cartimar.
Pwede naman skimmerless basta malakas ang filtration mo and very religious sa water changes. Find a HOB filter or OH Filter that is made for a 10 gallon tank. Get the known brands like Resun or Eheim.
Get a wavemaker para walang dead spots sa rocks para hindi mag-accumulate ang detritus so that makuha ng filter mo. I use Resun Waver-2000 for my pico but it also works well for 10 gallons since the pump is rated to 25 gallons.