All will work, and again depends if u want to spend a lot
If I was in ur situation, for now I would set up in garage and run hose round from were tap is, u could tac the hose along the bottom of the wall and round the corner, to keep it nice and neat, it would have to cross the floor to get to the garage tho, if the floor is soil then just dig a chanel out and some plastic pipe for hose to run through and bury it.
I think for now the most important thing is to get the RO set up and working, u could have it running and fill 2 ibc tanks, that way u would have plenty incase of emergency. These can be picked up for around £30 each
Once up and running u can see how u want to go about sorting a long term water supply out