Thinking of installing an indoor hot tub? At the very least, don't do it yourself! Although an indoor hot tub gives you more privacy and fewer maintenance issues, you have to think about mold inside, weight capacities on your flooring, and the multitude of electrical and plumbing issues that could arise. Here are the pros and cons of indoor hot tub installation.Thinking of installing an indoor hot tub? At the very least, don't do it yourself! Although an indoor hot tub gives you more privacy and fewer maintenance issues, you have to think about mold inside, weight capacities on your flooring, and the multitude of electrical and plumbing issues that could arise. Here are the pros and cons of indoor hot tub installation.