Actually, there is an engineer in (I think it was) New Jersey who built his own home "hydrogen energy system". For storage, he used old propane tanks. He just used bigger tanks and stored under lower pressure. His "one off" system was quite expensive, but most of that was "in the engineering". He was developing a business to sell such systems to "rich guys who own islands" and who wanted all the amenities of civilization, but cheaper than boating in diesel. His estimated cost per system wasn't all "that" unreasonable for "boonies" operations. I'll see if I can find that article again....it's been a few years since I read it.
It was on the order of $500k - he used solar to crack hydrogen, then used the hydrogen to make electricity.
It worked - he powered his house.