I asked for the awareness of the spouse, the answer is positive.
These sort of questions are technically hard. Asking if something is forbidden is simple: a positive answer comes with sources, texts, reasons.
Asking if something is permissible is harder: a positive answer is the absence of sources, texts, and reasons.
So from my many readings, I am unaware of a single source that would make this marriage unlawful. Nor am I aware of a single source that says tetraplegiacs or extremely old people should not get married (in fact, one of the companions of the Prophet, Muadh, was married on his deathbed because he did not want to die celibate).
If there is no dishonesty between the spouses regarding the various conditions, then there is nothing stopping you.
What I have read is that it could be discouraged if you had no sexual desire (if you are asexual or homosexual, for instance, whereby the spouse is used only to conform to a social norm, and not because of a desire for her, which basically amounts to stealing her life and trapping her in a loveless marriage).
But having a sexual desire that you have difficulty fulfilling, while regrettable, does not make the marriage unlawful. Good luck to you both.