@Ros52 Guests who expect hosts to lower their prices because the listing price is too high for them will usually turn out to be entitled and demanding guests in other ways, as well.
You guest's financial situation is not your affair. This is not a friend or relative who you need to feel you should help out.
If a guest finds your listing price too much for their pocketbook, they should be looking for listings which meet their budget, not asking hosts for discounts. Half of these people probably have more disposable income than you do- they just choose to spend it on new clothes, the latest Iphone, or expensive coffees at Starbucks. You don't have to feel sorry for them.