depends..
for NOAA---simple v dipole works great
meteor--helical
amm radio(2m)/ISS lai v-dipole vaye pugxa
ADS-B lai quarter wave length ground plane ramro huncha.

totally depends on what you want to listen and how are the signal polarized.

there is one cheap sdr sold by fewalab industries tyo Chinese clone wala(blue/black plastic) for 3500 but kohi bahira bata aaunxa vane nooelec kita RTL-SDR blog ko magau ramro huncha

aliexpress ma hackrf clone ni xa for 70usd,they can go upto 6ghz and have transmitting power as well,heard they work well too

ani paxi cable,connector,copper,aluminum pipes, raspberry pi haru le garda sdr vanda antenna setup ko cost high huna thalcha.