David
The best value for money is Scotland for an architectural junkie is The Old Course on a Sunday. Nobody, including yourself, is allowed to play. Just wander among the hillocks, avoiding the wifies with their prams and the pensioners with their sandwiches and cups of tea. Bring a golf ball or two and when you get near a green, slip one of them out of your pocket and roll it and watch it tumble and turn. If anybody gives you grief, just tell them that you are playing "fetch" with Tom Paul's dog, who is lost........
Second best value for money is walking the courses that allow public access while others are playing. TOc (on non-Sunday's), Carnoustie, Dornoch and Lundin Links come to mind. Watch shots being hit by proper and improper golfers. Enjoy the fresh air and the views.
If you actually want to play golf, your best bet is to go north and play, firstly, the courses on the Moray Firth, from Peterhead, through Fraserbrugh and Cullen and Lossiemouth and Fortrose and Rosemarkie. They used to have an "all the golf you can play for a week" sort of ticket up there which was ridiculously cheap.
Then go to Sutherland and play Borra and Golspie and Tain and Dornoch. The latter will set you back $80-90, but is still the best value for money around for a truly world class links.