I handle the day to day actions of all of my domains. When I setup WordPress for my domains, I chose a unique password, and I’m the only one that has access to the backend. Therefore, any updates on the pages is my responsibility. Also, paying the registrar and hosting fees are my responsibility as well. Registrar fees range from $12 – $50 per year.
For most of my registrations, I use Name.COM for my registrar. They are reasonable and a cost effective solution. There are a couple of domains that aren’t handled through Name.COM, but those are exceptions rather than the rule. For hosting, with exception to the .tel addresses and fspeml.com, all of my hosting is through Dreamhost. Obviously, if you are reading this page – I pay my bills.