lvflyer - can I urge you strongly not to sacrifice home ownership in preference for a 1970's Enstrom or any other material object for that matter.
By the sound of it you must really love flying and that is commendable but, once this little adventure is fulfilled you may well find yourself in the unenviable position of owning a *depreciating asset in which you cannot even boil a kettle to make a cup of tea!
May I suggest you maintain a home for your future and put aside what you can for the occasional renting of a helicopter where you can put a couple of hours in every few months or so - if you don't have a valid licence then you can do this with an instructor on board.
Never get into helicopter ownership and operating unless you can comfortably afford to do so and certainly never jeopardise or exchange your home for something like a helicopter.
Hope you don't mind me expressing my views on this.
*Not just annual depreciation on value but the fact that the asset will depreciate exponentially if you miss out on scheduled maintenance requirements.