Thanks, folks. Sounds like it's worth a try, at least, and I can get an early start for a long day up to FW. And will be leaving before breakfast hours, so that's not an issue.
£35 for a bed , that’s way more than a syha hostel. You can sometimes get a twin for not much more.
Yeah, it stings a bit, especially when this time of year places like the Alexandra in FW can be under £50* for an en suite with breakfast. But the Alexandra is in FW, with all the other hotels, and the Kingshouse... isn't.
*Actually, checking my records, I had a November stay at the Alex for £35.70 last year. Can't remember if I got brekkie, though.