ok. So this is just a rental park. Off the bat- it is very very very small unless you have another property in the area or live really close. Rents for the homes must be around $600 per month to come to a 50 - 60 net.
Your looking at paying $47,000 per pad- which is very high.
Adding homes will cost you the cost of the pad and of the home.
I think the park is valued on net income and not by breaking the park into the park components and the rental home components.
I do not even look at parks less than 40 pads- too small and not enough tenants to spread the expenses around.
If your moving forward, your next step is to know prevailing space rent for parks in the same are with the same amenities. Then you can break the gross income into space rent and home rent.
Then you need value the park as a park, and then value the homes based on age, turnover, condition etc...
Then you plug in the income to see if it all fits together.
I suspect, the park is overpriced by a long shot- again- unless the location can be a McDonnalds or a gas station.
Value is 1 of 3 things- and the process is called 'highest and best use'.
1) market value (like regular homes most of us live in)
2) income approach (Gross income - expenses (no debt service) / CAP rate)
3) highest and best use... geesh- this corner is right were a Mc Donnalds would put a restaurant. So it is not worth $300,000 but is worth $750,000
To get that type of valuation you would need to use an MAI for your appraisal. Regular home appraisers are not accredited to make a valuation like this.