I think some areas may have more homes that are in need of updating, but it's not the same as trying to find a rental that works since home prices and rents don't increase proportionally. 

My first thought is that we'd split them after his expenses, proportional to the amount we each had in the deal. 

The only time I ever see any significant number of trailers for sale that can be moved is during freeway expansion projects - and most of those projects that would effect a park have already been completed.Also, actually moving one of these things is task of monumental proportions. 

Get good properties in good areas and get a good screening process in place.Other risks, include regulatory risks which I think are in proportion to the size/scope of projects you take on (if you're fixing up houses lets say before renting them).Other risks include common maintenance items. 

Its so ridiculous he wants to blow out off proportion, We already spent a lot to pay the tree guy to cut down so i just want to find if there is a legit site regarding the trees law.  

You could sign contracts with him that would prevent him from going around you, but then again build the relationship and there should be no reason he's not happy to pay a fee for bringing him the property.Also, keep in mind your fee doesn't have to be huge, or even proportional to the size of the project.

I agree with you about wanting to help people first, like Earl Nightingale said: “your rewards in life are in direct proportion to the service you render” and the money may not all come from those you serve.

Can anyone opine on a good compact w/d combo to look at as well as the hit on my water and electric bill after installation?

You could also split ownership and or cash flow based on the proportions of the capital accounts. 

This would save on space in the compact areas meant for securing personal belongings and sleeping.