Probably too late for the contest but I know a little Dan Kennedy myself so I'll bite:
1. Calculate the lifetime value of a tenant. How much do you net per month, times how many months does the average tenant stay (their lifetime value as a client) now decide how much of this are you willing to pay up front to buy such an average customer. Is it 10% 20% whatever you decide. Would you pay $500 now to get $3000 per year for the next 5 years?
This number is probably higher than what your competition is willing to spend so you can outmarket them.
2. Stop advertising for MH for rent or sale and advertise for a free report. "How to afford your own home in today's economy without bank loans, even if you have mediocre credit" or something like that. Instead of trying to catch qualified buyers in your net in one fell swoop, make it a goal to create a list of prospects with maybe 100 names on it. Then whenever you have a vacancy or special offer you can send your whole list a postcard or e mail, and offer them a finders fee if they don't want it but send a friend.
3. Advertise in non traditional media where your target customer will read, Pennysavers, retirement magazines, Church bulletins, Veterans clubs, Square dancing clubs, local restaurants, mechanic shops use your imagination but think like your customer
4. Pay your referral fee in increments. $100 gift for first referral then $120 or $140 gift for subsequent referrals by same source. Consider giving $50 bonus if the referred tenant is still there after the second year.
5 Most reputable people sign up with a Church when they move into town. Contact the closest 15 churches and offer to rent them a unit at reduced fee for their own use for new people getting settled in town or offer to reimburse the church in cash one months rent for a good referral. Same applies to local charities and social organizations, they know people who are looking for a house.
6. Create customized "reward for referral" systems for local school teachers, policemen, mailmen landscapers, shopkeepers and all the mom and pop businesses around. etc.Offer to let them give you a card or coupon that you will put in your tenants welcome package (Free advertising for them) Once a year send all your referral sources a little gift.
7.Craigslist ITS FREE but use a headline that will be attractive to your target audience and refresh it often
8.Leave a card at all the FSBO houses you see around town, pretty soon they are going to be looking for a new place
9. Call the other guy that advertises in your newspaper for buyer/tenants and tell him you will give a fee for his buyers list if he has extra people that responded that he cannot accommodate
10. Contact all the rehabbers"I buy houses guys"in your town and ask them to give you their buyers who could not qualify at the bank.
11.Create a USP(Unique selling Proposition) something that they WON'T get at the other parks that is unique and customized for your park so you can stimulate "word of mouth" what if your tenants are the only ones that get a kids meal free at Denny's or a discount at the movies or the bowling alley. What if you pay for one load of laundry a week, what about firewood for BBQ, Create a library or book exchange, have games they can borrow on a rainy day, What if each unit gets a steak from the butcher once a month for barbecue- use your imagination It does not take much to impress people with a little kindness and make them feel part of an exclusive community.
How's that?
Will you publish some of the other suggestions for us to see?