Brother problems

Okay, my first thought is that the two of you need to separate your business arrangements from your family business.

So, if he has the financial resources, then your brother should offer to pay for all or part of his food and other living expenses. Offering to pay when you all go out would also be a nice gesture.

Meanwhile, this is not "family helping family." You are not intending to stay in this house; you do not want your brother to help you decorate because it will make your home a wonderful place to live and relax.

You want his expertise because it will benefit your bottom line when you sell.

That means it is a business arrangement and you should pay for his services.

If he chooses to give you a discounted rate because you are family, then that is "family helping family."

And in return, your brother will be able to pay his cost of living expenses because of the income he is earning.

Everybody wins. 

You state that your brother is a decorator. I presume you mean that is his chosen profession.

Since you are having him decorate the house you purchased (which you then intend to sell at a profit), then you have, in effect, hired him to do the job.

That means you should pay him for his services.

If you wish to broach the subject of a discounted rate due to the living circumstances, then that is appropriate and your brother should be willing to accommodate your request.

If you pay him the going rate, then he can pay his living expenses in turn.