I don't think the expected return is practical.
1. I suppose most of the cash income come from the local calls made.
2. To make $350 a month, there must be 1400 calls a month. That is 47 calls a day ==> 4 calls an hour (didn't take the other 12 hours into account)
3. Do you think there will be four calls every hour, Monday to Sunday?
Conclusion: if I were you, I would stand by a pay phone for a week, to see how many times it is used during that period. Then I would have an idea of how much money I can make if I invested on that pay phone.
1. I suppose most of the cash income come from the local calls made.
2. To make $350 a month, there must be 1400 calls a month. That is 47 calls a day ==> 4 calls an hour (didn't take the other 12 hours into account)
3. Do you think there will be four calls every hour, Monday to Sunday?
Conclusion: if I were you, I would stand by a pay phone for a week, to see how many times it is used during that period. Then I would have an idea of how much money I can make if I invested on that pay phone.