Fishless cycle will take you to the full stocking level faster. A fish-in cycle will get you to have some fish sooner.
I am not going to judge anyone who wants to do a proper fish-in cycle. If the person is prepared to do what is required for the sake of the fish (and starts with a very small stocking) and is willing to patiently attend the needs of the fish and faithfully change the water each and every time needed. If the person is going to be around the entire time and knows what to do, there is no reason NOT to do a fish-in cycle. But, if you can somehow find some mature media from any source, you would put yourself far ahead of the curve.
Ultimately, the decision is yours. I will back up your decision, whichever it is. You seem to be responsible and willing to do what it takes. I did a partial fishless cycle, and finished my cycle with fish, as I rescued some fish from a friend of a friend who was giving up her tank. My tank wasn't fully cycled for 5ppm daily ammonia, but it was fine for the amount of fish i rescued (that and I took the media as well!) so I never had to worry about ammonia spikes. Although, I did have some melting of my plants, which led to a mini-spike of 0.25ppm ammonia. I did a water change and haven't had an issue with ammonia/nitrite since.