Multi time building
Back in the days when CRT flight displays were all in shades of green I had a good flying job that was definitely not a time builder. A buddy and I did a lot of multi time building by renting a decent IFR equipped Aztec and doing the safety pilot thing. We would ussually file a 6 leg X/C IFR flight plan and shoot an interesting approach under the hood at the end of each leg.
It was a lot of fun, worthwhile, relatively cheap and very different from the military stuff I was doing at the time.
FT