We just completed out first billing using a program set up by a VA in the Philippines. Got a couple of little bugs to work out and we will have those fixed by next month. The program is a mix of Word and Excel and it even prints the envelopes. On the bill, residents see their names, lot number, month/year, dates of the current and previous meter read, usage in gallons, lot rent or RTO payment, water, sewer, garbage, any special charges, a total, and space for a monthly message to everyone. This meets all legal requirements for billing in OH per the attorney for the State mh association. The total cost to set it up was about US $200 and this is far less than what billing companies wanted to charge me to set up an account. Billing companies wanted to charge me $5 per month to do this(in addition to the start up fee), so I pay the manager $4.50 per lot and then I pay for the stamps and envelopes. What I really like is that I can so easily check the bills before the manager gets them and make any necessary adjustments for things like late fees, etc., without having to go through an account rep in a different time zone.
If you want to contact the VA, just send me an e-mail and I will give you her e-mail.