It has to be cheap.
That made me laugh, isn't the first thing you learn about flying is that it isn't cheap!
I'm at the end of my hour building phase and I bought a share in an aircraft at my local airfield. Good availability, weather was good enough during the summer and having it local allowed me to carry on studying for ATPLs and working to build up the money. Not cheap but certainly less expensive than some methods.
Also having an aircraft in the UK has been useful as I've been able to take friends for flights, so they've paid for they're share of the cost, effectively halving my hourly rate on some flights!