I had a vacant land deal I was evaluating but since moved on because I found out there was an easement involved.

Any advice on how to better source properties so that I can help the team grow their flip business?

Expenses prior to the property being placed in service will not be as beneficial from a tax standpoint If it is a business, bonus depreciation will be available in the first tax filing if there is a cost seg

Buy a commercial mixed-use property downtown on Main Street with room to put my business on one side.

Where have you had luck finding reliable ones that can support your business?

I am no where near a credited investor yet, but I understand the in's and out's of property management, business deals, transactions, and core understanding of how to find the right deals.

It was a collapsed clay pipe involving moving to a new lateral.  

The 10-Unit complex would be a commercial business, so the simple answer is to purchase and operate in an LLC.

Their tax advisor proceeds to let them know all the problems, and amendments need to be addressed by 3/15 of that year to be respected for the prior year :)For the sophisticated investors...the CPAs are (almost) always a part of the conversation with the attorneys when there are LPs involved. 

And you need more money, if you are not busy at work.