There should be punctuation added and an "and" inserted before the final factor, thus:

There were a few factors to keep in mind when going about the benefit cost analysis: 1) technologies that were going to stay, 2) those that were going to stay but be upgraded, 3) things that were going to come to the new house, 4) technology that will be taken to the new house and upgraded, and 5) things that would be disposed of.

If any of the items on the list also contained a comma, then it would be better to separate the listed items with a semicolon, as @Peanuts example shows.