Structure depreciation is simply the value of your structure split out over 27.5 years.

What other ways could we structure this where it makes financial sense to me (not trying to make a ton, just enough to recoup costs and get me a better return than a bank) and helps them by getting this house?

I cleaned the property and lot up and repaired the structure and it was not in as bad as shape as I originally thought.

If you're looking for someone to have expertise you don't and provide turnkey plans with all structural details, etc it'll be hit or miss.

If you find projects that are good enough to invest outside of a tax-advantaged structure AND they're full on this type of subscription you could always choose to invest in those opportunities individually. 

If not, what's the best way to structure the deal for myself, the cash buyer, and the agent?

Neither the other co-owners, nor the sponsor, nor the manager may advance funds to a co-owner to meet expenses associated with the co-ownership interest unless the advance is recourse to the co-owner (and, where the co-owner is a disregarded entity, the owner of the co-owner) and is not for a period exceeding 31 days.The co-owners must share in any indebtedness secured by a blanket lien in proportion to their undivided interests.Distinguishing a Partnership From Co-Owners of Leased PropertyIn the case of property to be purchased by more than one equity investor and subjected to a long-term triple net lease, it may be possible for each equity investor to structure its participation as a purchase and lease of an undivided interest in the property, separate from the other equity investor's transaction, so as to preserve arguments that the equity investors are mere co-owners.

Then you can either own and operate this new structure (like a Trump golf course), or you can sell it, like a new housing development.1b) Development can also be taking something old, like the Old Post Office in DC, and turning it into something new, like a Trump hotel (this is happening currently), thereby adding value.

Because these are personal and not commercial investment property mortgages, the structures are very attractive - 30 yr fixed rates that are around 3.5%, 20% down originally, with no prepay penalties, reserve requirements, etc.

Because these are personal and not commercial investment property mortgages, the structures are very attractive - 30 yr fixed rates that are around  3.5%, 20% down originally, with no prepay penalties, reserve  requirements, etc.