Building isn't always a matter of having unlimited time, it's a matter of fitting it into the time you have available. For example, in repairing a 60 powered Super Sportster wing after a deadstick into brush that tore out the LG on one side:

Wednesday morning, brought plane wing and broken LG pieces into house, washed off oil, dirt, and grass. 12 minutes.
Wednesday night. Cleaned up the area around the broken LG block on the wing, mixed up some 15 minute epoxy, glued the block pieces into place. 15 minutes.
Thursday morning, getting ready for work. Reinstalled the LG strut, added a $kote patch to the wingtip. 15 minutes.
Thursday night. CA'd backing plates into a hole in the LE sheeting. Installed the cracked out pieces. Sanded. Glued on a 1/64" plywood piece over the cracked area with Sigbond. Stretched on some rubber bands to clamp it to the LE curve. 32 minutes
This morning, getting ready for work. Feathered the plywood patch with a sanding block, cleaned up the dust, sealed on the $kote covering patch. 18 minutes. Plane is again flyable.

Working like this, I once built a Goldberg Electra glider to ready to fly in less than two weeks. That was also about the same time involvement I had into getting a GP .40 size ARF Stick ready for flight.

For most of the last 42 years, a 40 hour week on my time card usually meant I was on vacation, or earlier this year, on medical leave. One way or another, I always found some time to build. I have even been on business trips where I have even been able to find time to build a couple Ship-in-a-Bottles between travel, actual work, and the seemingly obligatory liquid lunches when business types are involved.
But that's me. Building is a major part of this hobby/sport for me. There are quite a few people who are only interested in the flying aspect, just as I know more than a few who only like to build planes and watch somebody else fly them. More power to both! Different strokes for different folks.