Portuguese Classes

Salutations chums!

I am trying to price up the cost of going to Portugal to do 2-3 weeks of Portuguese classes at an intensity of about 4-5 hours per day however I only want to do private classes and the schools I've seen that offer private classes charge more per hour than it would cost me in the UK, which for Portugal is ridiculous. Can anybody recommend a decent, private teacher? I don't particularly care where in the country s/he is as cost of living is cheap in Portugal everywhere.

Thanks in advance!

Patrick