I was raising 500k on a deal, had one high net worth co-GP on the note to satisfy the lender and had investors contribute up to 99k for the remaining funds to stay under 20% equity and keep them off the loan. 

For example, if only one of you will be making management decisions, you may justifiably receive a greater share of the profits, even if the capital contributions are equal. 

I'm excited to learn from all of you, and I hope I can contribute some knowledge as well!

One typically wants to reduce the purchase price so you can contribute more.

If you are still employed and still at the company where you contribute, you can take a sizable loan from it.

Or you could each contribute your interests in the property into a new LLC and have the LLC then become the owner. 

Of course you won't have to book that extra income, but can you write any of this off as a charitable donation?

@Jennifer Thomé a blanket statement but what I've generally seen is the in a vehicle like a a Charitable remainder trust the Charity benefits to the tune of the tax savings. 

Contribute in increments of $5k to the pool - you would receive "read access" to the pooled account3.)

We're thinking of using Landlord Studio or Rentec to keep track of income/expenses at the property-level, but would still need a way to track expenses for the organization (not associated with any individual property), as well as tracking capital accounts for owner contributions.