Your own network is a cost of doing business...
...like your office or any other physical aspect of your business. Not only that, but I consider problems that arise with my home network as a warning sign and reminder of what I'll be facing with clients. (I try to maintain similar configurations to what my clients have in order to test software & hardware) If an update goes south, or the proxy server does something weird, I know I can expect a call from clients, or better yet, head off the problem before they even notice.
Just as I expect to devote several hours a day to tasks such as accounting and education, I expect to have to spend a certain amount of time and expense dealing with hardware or software failures within my own office. Doesn't mean I enjoy it when the hard drive in a sever starts making that clicking noise or when my desktop goes blue-screen and then doesn't reboot like it did recently, sucking up the better part of a day. In IT, we have to expect to endure a certain amount of the pain & expense that our clients do. It's probably a good thing as it keeps us humble.
