I use GSuite - I have an account from when it was free. Only just realised I could have domain alias for other domains.

I use a set of recurrent tasks, that helps me to (a) keep doing what needs to be done in my freelance business and (b) allocates time to online projects (aka shipping)

I would be interested in an answer as well. I have tried Flippa, BrandBucket and BrandPa - so far not very successful.