Most of the larger coaxial cables are solder free. Getting that much heat into the cable to solder will almost always damage the dielectric and create a VSWR hot spot. The captive connectors are OK as long as you get the right kind from a reputable manufacturer. I like the Andrew (now commscope) connectors and should only run about $20-30 each end.
The instructions come with the connector and they recommend the use of a hacksaw and file. I have found the installation to go much smoother with a dremel tool with a cutoff wheel, then use a file to smooth the edges. I have terminated up to 3" cable using this method, although a portable bandsaw works better on larger cable.
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