You are in private business; you are not a public servant. You have the right to accept and deny work or customers based on your preferences. If you do not feel comfortable with a specific job or working with a specific person, decline the work. Trust your instincts.
You set the rules for your business. It is especially important to set guidelines for clients when you work at home. Have specific work hours or see clients by appointment. If you allow customers to drop by anytime, they will do just that – day, night, weekends, holidays, etc.
Make a contract or receipt that specifically states agreed upon work, condition and amount of materials or garments taken in, price, and due dates. Have the customer initial or sign this document.