Tengu, you own your house back home. Is there not a University nearer to there where you could study ? Most universities will help/ advise with transfers. I know you said that your undergraduate degree was tailored for you, but if your qualifications aren't transferable then maybe you need to think again about
this postgrad ?
Your home is a major asset, are you renting it out while you rent and live in the caravan in Cornwall ? and if not, might that not be the answer to your financial woes ?
I know that Scotland has a different funding system, but many students still stay at home while they study. It makes it less expensive overall, though daily commuting can become a bit of a grind. Both my sons stayed at home and travelled into Glasgow when they were at University. We were housing and feeding them anyway, nothing really changed that way. They did stay over night in town at times, and they did bring friends home to help clear the fridge, freezer and pantry, but, that's just youth

On the other hand, my sons, and many like them, went to University at 17. That's relatively common here when they've done well in fifth year highers and don't need to stay on for sixth year. Four year honours are normal here.
Work that might bring in money ? you write, and you photograph, why not write articles, and see if you can find a company that will put your articles forward for publication ?
This one is a bit "screaming banner headline-y", but you get the idea ?
https://www.sellusyourstory.com/sell-my-story/
Best of luck sorting it out, Tengu. I suspect that the worry doesn't help you focus on your studies.
M