using a portfolio management service incurs overhead.
I have a personal portfolio of 34 domains, spread between 5 registrars. on the other hand, I do not have any personal domains in france or Italy, where it is difficult to register...
I would say that if you do not have a legal presence in Switzerland, Italy, Spain, France and other countries of interest, then use a proxy like Iron Mountain or DomainTheNet.
If you have a legal presence and are decently organized, you can handle 35 domains using excel.
As far as DNS goes, you need it for two reasons. Sometimes you plan to use with active web sites and services.
Some registrars demand an active DNS even if there is absolutely no internet service associated with the domain, for example if you register domains defensively to protect a trademark.
I advise against using Iron Mountain's DNS service if you plan to use the domains actively. Get your ISP to help you or get a dedicated DNS service.
Last thing, define a generic email address like
[email protected] , make it an internal mailing list, and get your name and someone else's on it. use this email address for all registrations, admin and tech contacts for all domains.
