Here is the background:-While driving for dollars I came across a vacant house on a nice street and within a good neighborhood.

The beautiful thing here is if you get a really good deal on land it really boosts the appraisal and can mean less out of pocket cash. 

I have a background in commercial real estate information and the first thing I would caution is that always assume the numbers are being fluffed up.  

Be very careful, there is always family in the background. 

My background is in banking and direct sales.

Looking for rough estimates for building a small church (4000 to 6000 sqft).Background: Since I do some flips here and there, my church officials decided it was a good idea to include me in the Building Committee.

I gave my $300,000 move-in ready beautiful vacant home to this large well known local co in Oct 2016.( Ive owned and self-managed another very similar rental in the same subdivision-- since 1998--and it has never had one day of vacancy in 16 years-- rented at $1860.)This professional pm co put all utilities in their name on my new property and turned the hot water heater ON and the Water ON ( even tho the main water cutoff valve is easily accessible in the coat closet beside the garage, the entire 3 months they 'managed it').They let the property sit VACANT OCT-NOVand on their "routine inspection on Dec 1, to make sure hobos had not moved in" they SAW the water heater in the garage was spewing (at full blast) A 20' stream/ fountain of HOT WATERand that the entire finished closed garage was covered COVERED !!

Also asking for in depth advice about what we should do while we do this.My partner has a strong construction background and probably has a better idea of what to do.

3000 seems steep for a Walnut Creek apartment, you must be in one of the beautiful complexes like Ivy Hill or Brio.

Here are some articles to look over might be of help :Detroit Revitalization Efforts - https://www.freep.com/story/news/local/michigan/detroit/2018/05/07/how-detroit-plans-raise-130-m-invest-7-neighborhoods/585989002/Areas on Detroits "Revitalization Map"https://nextcity.org/daily/entry/detroit-expanded-plan-to-spread-the-wealth-to-neighborhoodsFitzgerald...https://www.crainsdetroit.com/article/20170405/news/170409919/fitzgerald-neighborhoods-4-million-plus-project-to-be-led-by-the http://www.fitzgerald-detroit.com/background/ Grandmont-Rosedalehttps://www.crainsdetroit.com/article/20180510/news/660351/develop-detroit-plans-70-new-renovated-homes-in-north-end-grandmont Dugganhttps://www.yahoo.com/news/detroits-mayor-walks-line-recovery-gentrification-can-work-cities-090025888.html?