I agree - homesteading is a great way to stay "young" and fit, but my very fit father died at 66 in less than a week from esophageal cancer. That said, a car accident can take even less time. Farming's not the easiest or most lucrative way to make money if there are middle men involved, so "loans" or "commitments" can easily compound the problem. Market gardening also removes huge amounts of important nutrients from your land.
I would just be very careful to make sure I understood the consequences of having to terminate the arrangement sooner than 5 years due to health or other issues.
Vickie Shaw wrote: I have the opportunity to obtain a 100 ft high tunnel through a grant but would have to sign a five year contract to sell food that I grow.