I can do a run every hour ( birdhouse are an average of 50 mins per run, but it can be longer due to random tick intervals ).
If starting at 11 AM and ending at 9 PM this will mean 11 runs per day.
This will cost you 40m per day ( 11 runs ).
I can also add herb runs ( if you have seeds, teleports ) for an additional 2m per run.