One other thing, I also wanted to second Brendan's allocation of 5% for CapEx and Maintenance but to base it on the condition of the property.

To protect yourself from big losses you should value the park based on the portion of rent that can be allocated to lot rent and if you have to value the homes then value those based on shell value or what you can comfortably sell them for. 

I would find some compelling funds to allocate some money to.

You can allocate any tax benefit, I'd say you can do it, just be very clear about the allocation in your agreement. 

Any reasonable allocation method is fine.We usually use square footage to allocate basis if there are different units, but per unit might be fine if there are a lot of units and they are all roughly the same size, give or take. 

The recently approved CARES Act allocated a lot of money to this program and organizations are having a hard time spending it all.

If say the land is worth $250,000, then $200/square foot of the $400/square foot is allocated to the lot. 

This is why every deal analyzer has allocation for CAPEX and repairs as an expense.

The newly renovated condos I purchased only allow 21 out out of it's 104 units, they say 20%, allocated to rentals.

Simple.If your plan is to try to find 2 end buyers, in addition to the assignability provision, you'll want to also allocate the purchase price for each parcel in the original agreement, then deal with the contemporaneous closing issue in your assignment agreements.