Location is always one of the most important things when operating a business! But I think your real question seems to be whether it’s safe to invest in a business aimed at lower income customer segments if it is located in a high income neighborhood. I haven’t acquired my own laundromat yet, but it seems obvious to me that in this case you would simply focus on marketing a pick up and delivery business, since the customer base has plenty of money to support that service, and a need for it. You should also ask how long the business has been there. If it is profitable and it’s been there for years, then it seems like the answer is yes, it’s safe to acquire a laundromat in that location.