DIY Card Access

I am a low voltage tech and install (physical security) card access at work quiet a bit. I am familiar with many panels and readers however, without a head end/ server a conventional panel is useless. Any suggestions on how to use rfid possibly connected to an old computer connected to a usb relay board which triggers certain out puts to unlock doors turn things on/off with rfid/ prox key fobs old hotel room cards etc.? not necessarily to be used just for card access but to be configured turn on and off appliances on schedules....

https://lh6.googleusercontent.com/public/FUHTwsdhKQNbZ0peELv_jMB0jDDzoSQuBeLH0pmWsUAWYOb1FobgKNv1Kh1LhPSTneMXNzvBa9vccoiWO6p3BEriC9GrQ50D10dc49UtLoe67CErSm8LXSlxBydSq7vz9ChYuZdZxht9LS_wYABeh0OjLyPM9NJl7ARfmt1UZiQPmp3f682sr0k=s220-c

Magnifier250_medium

via www.mcmelectronics.com

http://www.youtube.com/watch?v=JowKaKfRPEc

http://ep.yimg.com/ca/I/yhst-38044448595135_2258_10227945