If the requirement is to measure at 100 MHz, then there's always the VNA. The accuracy is in a far more restricted measurement range, but at least it's affordable. Obviously doesn't replace a high-end (tens of $k) LCR meter. Another bonus being that if desired you could test the inductor in a bigger network as it will be used, e.g. filter, etc., rather than a component in isolation.
The set-up time with the VNA is long, but it would equally also take time setting up a decent measurement with LCR or impedance meter. They all use fixtures and require nulling-ing out/calibrating, etc, for accurate results. LCR meter short/open procedure can take ages across the frequency range.
Example screenshot shows a DIY wirewound inductor measurement (approx 400 nH) with a VNA, the dot shows the measurement at a spot frequency, and you can also see the resonant frequency.
Back to the accuracy, sometimes that's not actually needed, as long as the circuit is tunable, and just as important (or more important) might be checking the ballpark at a frequency, and then measure the overall response or output in-circuit, with VNA or sig-gen, 'scope, etc.