They trusted me and saw that I had a track record of rehabbing lots of houses for years(not my first deal or second deal or third deal).

As you build a track record, more and more people will want to invest.

When looking at their records, there is also a special assessment for almost 50k.

Besides going door to door, I would search city court records online for divorces, judgements, bankruptcies, evictions.

Example: evictions records, newspapers (the worst place to advertise is often the mom n pop landlords go to), local (city) complaints department etc.

shows as single family on the tax records.  

I even reviewed with him that the tax records say that the building is a SFH but he assured me that the town does not restrict use of lots to SFH/Multi/Commercial/Ect.The CEO is willing to write a letter explaining that to the appraiser that the transition from a SFH to a Multi-family was completed 20 years ago and there have been multiple town assessments sense that time.

@Toni Conway You should have one tab that records all the transactions and another tab that summarizes the first tab. 

You also want to review their plan and exit strategy and make sure they have a handle on the numbers and the market and have a good track record.

It was so old there were no records or plans.