I've not been stranded, but...
I was looking to go to a new system and decided to take some cargo with me to make it worthwhile. I fuelled up & checked the Galactic map and the route was "grey", so I checked out how much cargo I could take. The route disappeared on 30 tons and reappeared on 29 tons.
So I bought 29 tons of cargo and launched from the space station. I aligned with the new system and tried to jump, and got some warning about it being too much fuel consumption.
I checked the map again and now it said that I'd need to be carrying less cargo - 26 tons. Of course, it had changed its mind after I'd launched.
1. The map needs to be accurate.
2. You should be able to buy fuel in increments, from stations and elsewhere.
3. It would be nice if I could see a current range figure onscreen at all times, while I'm buying cargo, buying fuel and equipment. In fact, I'm sure there are more pieces of information that we should be able to toggle on and off on our HUDs.