Another expense is that they often hire workmen

[Passionwagon]

"Another expense is that they often hire workmen."
Another spend/expense was that he bought flowers for Julie.

Do these make sense as complements?

[Tdol]

'spend' doesn't work.

[Passionwagon]

Thanks Tdol for your answer; do you know if the sentences are grammatically correct?

"Another expense is the workmen." This seems fine to me, but I'm not sure about:

"Another expense is that they hire workmen."

[Tdol]

Why not reverse the order:
Workmen are abother expense.
Hiring workmen is another expense.

These seem more natural to my ears, though yours are grammatically correct.