I'd do some digging on what REI events are happening locally and network with the movers and shakers as there may be some opportunity in your local market.  

Here are all the ways we have explored, from least amount of effort to the most:Advertise free lot rent for a year if they bring their own home into the park Work with the dealers who have showrooms and offer them an incentive to sell you their used trade-insWork with MH sales people who specialize in the sale of MH only (many times they will be dealers as well, but focused only on used homes)Network with MH movers who often times know of used homes that could be availableNetwork with wholesalers who flip MH (be aware of homes in parks with this, as most often the park will have first right of refusal and you cannot remove it from the park. 

We ended up selling the "Aberdeen" house (in 6 days) so we could buy a total gut that was built in 1905 and hadn't been inhabited for 6 years prior to us buying it.

Then, once we are ready to move, rent it out and have it as an out-of-state property. 

Attend meetings and glad hand with the movers and shakers.

One of the big movers in the tiny home movement just posted this video to bust a couple myths about tiny homes!

Depending on how badly you want them out, you could also pay for the movers?  

@Jay Hinrichs It is going to hurt the people who do not move rents each year and push what they can and have not in the past.  10% a year is more than we raise unless we are taking over a property with low rents. 

@Ian Swensson your cash flow is negative because you are competing with two other types of buyers for those kinds of properties. 1) Buyers who will live in the property and doesn't mind covering more than half because they are "investing" and they figure that when they are ready to move, rents will have increased and the property will work for them.

They don't have to fix things up they won't have strangers traipsing through their home looking at everythingyou will clear out everything they don't want to take with themYou can suggest movers, yard sale people etcYou can move fast and get cash right awayAnother segment could be Homeowners with Low Financial Stability Scores (FSS).