FWIW, I have often used good quality and inexpensive rg6. If you want, you can even use a pre-made 50 or 100 ft length, and then buy some pl259 to F or bnc to F adapters. Although maybe? not 100% matched (75 ohm cable) , the system has worked well for me at HF with 100W, and feeds a dipole just fine. Just make sure you get outdoor rated quality cable.
Welcome to the hobby
73
Brent