Dave
Everything is becoming more expensive and obviously holidays follow suit. But, you cut your cloth to suit your measure.
DIY can be worked to your advantage. More and more people are buying abroad and most of them need tenants to defray costs. These Holiday Home owners don't want to spend on continuous advertising and want to offload early. [Primarily, these people buy for investment, their own family holidays, retirement etc - I know, I am one]. Even an empty apartment costs money.
My advice again:- Book your apartment/villa as early as possible (even a year in advance).
Watch the low cost airlines, book early, be aware of their special sales. Sometimes fares are so low it might be worth your while to 'snap up' several flights and months later if one does not suit, don't travel. Low cost airlines are all about bums on seats.
Bear in mind transfer costs at your destination also and it might be cheaper and more prudent to rent a car.
Think of your departure from home - must you drive to the airport and leave your car there? Can you leave your car securely elsewhere and take a taxi/train/coach/bus to the airport?
With a little homework you can have extra holidays in the year. Remember 50% of all holidays booked in the UK are private deals with Holiday Home Owners.