Foscam comes to mind - they are relatively inexpensive - $85 ea - have PTZ (pan, tilt, zoom), IR, wifi, with audio capabilities. Resolution is definitely at the lowest end for IP cameras however with lower cost comes lower quality.
If you're looking for recording capabilities, although its possible to record remotely, the easy method is to store a NVR or computer at the property.
If all you're looking for is to remotely view the property for weather conditions, than the foscam will fit the bill at a price that's easy on the wallet. An Internet connection is all that is needed and power outlets where the cameras will be setup. Power over Ethernet - POE - is possible but a separate adapter is needed and POE Switch.
Here are some sample photos I have setup at my home. Colors are lacking for daylight shots but supposedly foscams newest model takes care of that.
I am in the process of installing higher resolution IP cameras in fixed locations.
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I can recommend more but honestly the best bang for buck cameras are hands down the Foscam FI8918w. The newer models I believe are FI89108w