Should I run Facebook ads for my clients from my own ad account?

The better practice is to have your client open their own ad account, set it up and invite you to manage it. You can create ad accounts for clients from your own, but Facebook limits how many ad accounts you can have, and for a newer advertiser that limit might be one, two or five. Keep your limit for your own businesses.

You can then connect the client's ad account in Votel's Ads Manager (Click Tracking, then Ads Manager) and manage their campaigns there.