My Idea:
To have a builders list of things to upgrade!
No new builds can be put in the list, such as become available after a townhall upgrade.
Does not include townhall or castle upgrade.
An automatic down time between building jobs could be set, even though I don't think its necessary
The next task/ upgrade can only be started if there is enough funds in storage at that time (gold or elixir)
The list could be for all builders as a group but may be better by builder such as with barracks and troop training.
The list can only include those things that you have enough funds to store to be put in the list. for example, if the upgrade costs 1 million and you only can store 800,000, you cannot place that upgrade in the list
The list can only include those things that obviously fall within the upgrade possibilities of the town hall level you have.
that's it off the top of my head, did a search, didn't see anything like this.
thanks

