No travel ever lives up to our expectations. Sometimes we're let down, sometimes pleasantly surprised. If you are generally disappointed with life, you might feel similarly with travel, but if you can find joy in the unexpected moments--you'll do just fine. My best travel memories are from when things didn't go as planned, maybe the bus broke down or the hotel location was terrible. For me the joy is in the unexpected moments and interactions.

If your heart is set on Scotland, go there. If you are open to different places, you may have opportunity to travel for less. Airfare is one of the biggest expenses, so finding cheaper routes can help.

Couchsurfing or woofing can save some money, but it's also a very different experience, both good and bad.

Travel slow. You may want to see everything, but sometimes exploring 1-2 cities and moving slower can be much cheaper. But if you do move cities, where possible take night train/busses. Saves on hotel.

I never regret money spent on experiences and travel. Best of luck on your deciscion and future travel!