Cloudron.io is by far the most developed homelab in a box kit. Worth a look!
However, when you need to install a more complex app like Taiga, it's often simpler to use the free Cloudron account to do it rather than install it by hand.
For sake of our vision we surely would like to make it more cost-effective in the long run, however we are bootstrapped and thus walk a thin line with a focus more on long-term sustainability not just blind growth. (10x cheaper though would realistically even pose an accounting problem with micro-payments or plain transaction fees taking large chunks)
Dozens of actively maintained deployments of (mostly) popular open source apps, a functional multi-user system with app SSO and ACS where possible, an integrated email server, multiple app instances, easy encrypted backup configuration to off-site s3/b2/nas/etc, simple automatic backup and retention policies, restore/clone down to a per-app basis, broad and deep documentation, complete published api, active forum
There is a recent thread on the forum where a few users espoused their reasons: https://forum.cloudron.io/topic/4372/what-are-you-favourite-...
All tools around it and more importantly app packages are open source (MIT mostly)