I believe that a majority of us witnessed storms while growing up. Did you know that there is a storm photography niche? It looks like something I would be interested in trying. What gear would I need?
It turns out that this a popular niche, yet most photographers do not know much about storm photography. I stumbled upon this link that is a collection of premium storm imagery. My interest has now gone a notch higher!
Storms cover a wide range of areas that even when taken from a distance, can still cover the whole view of the camera. Wide-Angle lenses would be valuable in this case if you want your shots to capture an entire storm or at least most of it.
It would be worth it to invest in a tripod because unlike in other niches, things are probably going to get wilder here. The environment's condition will be far from controlled, which means your camera will need more support on this one.
It could be a suitable freelancing gig for people living in the countryside. They'll have all the sceneries there, but there's also the danger of being too exposed. I guess you'll have to have the guts to have this as a niche.