They have some really nice machines for between $300 and $500 out there. Staples, Bestbuy, and dont forget NewEgg.com they have the best prices.
I have a wireless house, and recently decided to password protect my own connection. I found one of the winter renters at a house down the street could actually pull my connection. I was impressed with how far away they were. Its always best to protect yourself.
Make sure your passwords have upper, and lower case letters, and at least one number in it. Please dont pick pets names, childrens names, or your address or license plate. Pets names are easy to remember, but they are also easy to guess.
Congrats on getting it up and humming.