A Kept Man Isn't A Weak Man (слэш)

Sherlock is just out of university, but due to drug habits acquired at said college, Mycroft has cut him off, hoping to put a stop to it that way. Instead, Omega Sherlock struggles doubly, both with his cravings and with finding a job that will not bore him to death and support him financially.
Then, when he is on the verge of being completely destitute, he finds several hundred pounds ticking into his account for no apparent reason. He thinks it's Mycroft, but instead he receives an email from someone who promises to send him more money every fortnight and put him up in a flat rent free, on two conditions; he will stop taking drugs and he will occasionally be asked to be a companion for someone. He does not want to be bought like some toy, but what choice does he have?
The first time the door bell rings, he is sure the man will demand sex. But instead he finds a very sharply dressed man with money and physical power in his mid-30s who wants to talk with him and take him out to dinner.
Things quickly escalates on the emotional and physical side for Sherlock, but can you really have a relationship with an Alpha like that?