I was quite busy with that system, and ended up building a library of several dozen tapes, containing off the shelf software, but mostly software and data that I'd created and saved.
The problem I had was tape reliability. At the time, I estimated that each tape had about a 2-3% chance of becoming corrupt per day. Having more time than sense, I ended up going forward with an intensive, structured tape backup/duplication scheme, not unlike tape backup rotations I'd end up administering professionally some years later.
With the gear that I had, a tape duplication took 30-40 minutes, so this was a time consuming process, but it worked.
Why did my tapes go bad so frequently? In retrospect, there were two factors:
1. There was a high voltage step down transformer on a power pole about 20 feet from my room. I remember as a child that this transformer had problems at least a couple of times. In one case, it spectacularly sprayed sparks down on our back yard, and the electric company came out and messed with it multiple times besides.
2. In the other direction, our neighbor had a very tall CB antenna. Probably 30 feet or more, and the base of this thing was only 60 or so feet from my room. We know that he transmitted on illegal frequencies. (We sometimes heard his voice on our TV, I'm totally not kidding.) It would not surprise me if he was using illegal power levels too.
Good times.