I found that building my electric bike was a bit easier than the gas build, but that was because my gas build required some frame work to get right. And the gas build took a lot of tuning to get running well, whereas I did more research before building my electric so I had a better idea of what I needed to get before pulling the trigger.
My only issue with my ebike over a gas bike would be range. But since all of my bicycle trips are in and around the neighborhood, I specced the battery to get me at least twice the range I would need for a "long" trip, which is 5 miles round trip. I tend to only put about 10 miles per week on my bike since the usual trips are 2-3 miles round trip so only charge once a week.
If my rides were longer, I would have to find a way to pack on more batteries and would likely suffer range anxiety, so would probably have stuck with gas. But for my needs, I am loving my electric. Quiet, reliable, and powerful.
After I build my wife an electric, I will probably tackle a gas build that requires welding since 1) I want to learn to weld and 2) I have been wanting to build a 212cc Preddy powered 4 wheeled buggy for a while now