You can easily build your own antennas for satellite work cheaply and over weekend or less time. A 3 or 4 element yagi or quad for 2M, and perhaps a 6 or7 element yagi or quad for 435Mhz will do fine to get you started.
The ARRL antenna handbook or Satellite ops books have plans. www.AC6V.com
has links, and Cebik.com has articles. Plus plenty other on the web.www.AMSAT.org
has tons of info for beginners for free. A donation or membership will help advance the cause.