In the Caithness and Sutherland area you should expect to pay anything from £3 to £10 per day for loch bank fishing for trout (normally wading) and boat hire starts at around £10.00 per day with engines extra. Day tickets for rivers (which sometimes includes salmon angling) are £8.00 for trout and £15 up to £50+ per day per person.
Note: we can usually arrange all permits and boat hire in advance.