You can get LPG here, you have to have your car converted (I think a couple of K?), but as long as you keep hold of the car it's a solid financial investment. You do need to find a garage that stocks LPG near you, but they are becoming more common. It's something we want to do long term, but we'd need to have a car worth keeping hold of first! Our Proton is a lovely thing for what we paid, but too small to last very much longer, and we can't afford to buy a bigger one (neither have we the foggiest where we would park it).
DH used to cycle to work but the only job he could get after being ill was many miles away. We looked at moving near there when I got an offer for Bristol Uni, but the housing was unaffordable so I'm studying where we can afford to live (Bristol would have been nice, obviously!. We spend a ridiculous percentage of our income of work petrol, but it woul still cost more to find a house large enough for us inner city.
I don't drive now; I did, but I know my eyes are not safe so I gave up recently. I could probably get glasses stronger than the ones I have, but it's unaffordable. For years I caught a bus each day at 7.15 each am with toddlers (when I started, 6 months and 20 months)- nightmare! No seat belts so DS1 was forever banging his head, buggy spaces don't take double buggies, buses running late and not turning up (night time walks in December with one child in abuggy, one on a buggy board, 7 miles and no path on much of journey: bus didn't bother to come). Wouldn't do it again. tried my best.
As well a s commuting etc we have to look at other aspects of our society too. For instance, even if we moved to the nearest housing to DH's work, he still works unsociable shifts on an out of town shopping centre: there will never be a demand for buses back at 3 a.m. from there, and it will always be too far to walk.