Ever heard of Bulk SMS? So many organisations, groups and even individuals pay a lot to send bulk sms. However its a money making business for smart tech savy dudes. All you need is an account with any of the bulk SMS sites and have a means to get cash to the site's payment system of which the admin should remit to you units equivalent to your pay.
HERE IS THE PRICING LIST
Well, there is this site you should know. it is the cheapest I know with a very quick delivery and response system. The bulk sms site is amplesms which allows you to sen sms at 98k