I've read the FAQ and thumbed through a bunch of pages here and could not find the answers I need. I've never purchased, installed or worked with any type of CCTV equipment. 
  
I'm looking to purchase a CCTV IR DVR system.  I assist in the management of major construction sites, sometimes up to eight at one time.  Recently, we've had some theft going on at each of the job sites.  I'm needing a system that I can set up and take down often, to bring to another site. Anytime the system is up, it will be manned my certain employees, mostly myself  .  They do not need to be hidden cameras, just weatherproof IR's. 
  
If you've ever seen the show "Ghost Hunter", that's basically want I want to do(not hunt ghosts  ). To set up one night and move to another site the following night. 
  
I've seen systems that come with a fuse box.  I'd rather not go that route. Simple is better, if it can be done. 
  
Can I connect the cameras directly to a DVR for power 
  
                         OR 
  
Does each camera need to to connected to AC power?? 
  
Are there any manufacturers I should stay away from? 
  
I have an Dell LCD monitor, can I use it for a monitor?? 
  
Any tips or suggestions on types of equipment and what I need would help enormously.   
  
Looking to spend under $2000.00 for a 2 to 4 camera system. 
  
  
THANKS!!