Ask Can I manage membership website and niche sites together?

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I'm running a niche site, and I'm thinking about starting a membership website too. I'm not sure if I can handle both at the same time. Will managing them together be too much work? I want to make sure I can focus on both without one suffering. Do I need separate strategies, or can I link them somehow? I don't want to get overwhelmed or waste time on something that won't work. I need advice from those who have done this before.

Can I manage a membership website and niche sites together?