That doesn't sound good.Plus the owner of the park can raise the lot rent in the future. 

Ohio landlords can set their own rent amounts and raise them without any government interference.

Continue to learn and research strategies for raising $ to supplement what you're saving on your own.You'll note that most of my recommendations are about leveraging Other People's Money (OPM) while saving up yourself. 

Maybe they really want to move into a SFH and they need a larger deposit to do so, you could trade some cash for those keys in that manner....You also mentioned that the rent was below market, if they are on a month to month lease, then you should be able to start systematically raising rent to bring them up to market. 

I've read that there are processes in place for attempting to raise the rent to market rent for Section 8 rentals, and that attempt can be done once a year.

Once all of that came crashing down i pivoted to next shinny object multifamily joined a multifamily mentorship and quickly figured out that I hate underwriting but i enjoyed talking to people so that where i decided to specialize in raising money and finding off market opportunities. 

The listing stated if we put in 3k into each unit we could raise the rent $100 more than it is currently rented out for. 

It’s just that the units are tiny, however it could be very possible to raise rents to $500.

We're gonna try to find someone to rent out the second bedroom and then I'll raise the rent to $900 so they can split it.  

We are raising capital for our "proof-of-concept" project as we speak to buy our first property by the end of the year.