This is a quick XML mod which makes the City Hall investable.
Here's how it works:
Investment cost: 50
Money earned per week: 500
Money stored:500 (This means that the money kept at the city hall wont stack. If you miss a week, you miss a week.)
Cost to buy out: 100,000
Money earned per week: 20,000
Money stored: 40,000
Artists, homeless sims, divorced sims, sims who need a little help. This is for them. You sim goes in for an hour or so to fill out 50 dollars worth of paperwork, gets an investment certificate, and can come weekly to collect their money after 9AM on monday.
There were versions of this mod which give you less money per week, but I don't have those, as I only use the 500 one. If you'd like the others, you can still get them at MTS