Under the current official framework, no. The program describes a gift to the U.S. government and a processing fee rather than a business investment. Whatever else it requires is set out on the official page and must be read there.
No enterprise, no jobs, no at-risk capital, but read the rest of the terms
The distinguishing feature of the Gold Card, as its official page describes it, is that the applicant makes a gift to the U.S. government in a published amount and pays a processing fee; there is no enterprise to buy, no jobs to create and no capital placed at risk. That is what makes it different from EB-5, which requires all three, and from E-2, which requires a business the investor directs.
It does not follow that the program has no conditions. The official page and FAQ set out eligibility, family terms, payment stages and process, and any of those may carry conditions on the applicant's background, residence or activity that a retired couple must satisfy. The farmer should read those terms for himself and his wife by name and treat anything the page does not address as an open question.
A gift that is paid before the open questions are answered cannot be taken back.