How many unpaid days off can I get, and how often can I ask for them?

The client defines how many days off you can get. Most clients are pretty flexible, but you need to communicate your plans with enough anticipation and then talk to them about how you are planning on keeping your work responsibilities to ensure you complete the work your client needs you to do. The best thing you can do is to always communicate your plans to the client and to your personal Customer/VA Success Agent.