You have the internet. You have passports. Do you have a car? If you don't have a car, use a continental train pass.
My colleague, who does have a car, does 3 weeks with 6 people (him, wife, MIL, plus 3 teenagers) travelling Europe. Minimum 4 countries. Usually France, Spain, Switzerland, Germany. Off the beaten track, youth hostels.
Six adults, all ferry fees, petrol, money, meals, hostel fees never comes to more than £2.5K all in.
Not difficult with the internet, if you can be bothered.
can anyone work out the cost of one week for 2 adults 2 kids aged 15 there flying from Scotland?
Any particular week? any particular airline? any particular Scots airport? It really isnt difficult to pump information into a website with your own details