Hi, any in-home/home gym trainers have marketing advice to obtain new clients?

As Jocelyn said your current clients are your best bet. ASK for referrals. if your clients like you they will be happy to spread the word.
In contrast to Brian I charge MORE than most trainers in the area. That said, I have been doing it for almost 30 years, so I have a longtime client base. But by charging more I set myself apart, and of course, I deliver, so my clients feel their money is well spent.