the correct way to do it is to get an environmental company out and test for whatever kind of mold you have and its concentration.

They are likely to have a set of requirements for the space.You will need a project plan including architects, city permitting, utilities (water, waste water, electrical), possibly environmental studies depending on your municipality. 

You can also see IQ impacted by many other environmental factors. 

Optional, depending on neighborhood - Obtain an environmental screen (cost $350).

I also recommend getting an engineering/environmental report if the property is on private water and waste water treatment plants or has any underground tanks. 

There's definitely some uncertainty (and I would add climate change/environmental risk to that) so I'm always up for being recommended to articles and investment theses about AC.

Ideally, would like someone who can do everything for a reasonable flat price or package, barring any work out of the ordinary.Need help with drafting a purchase agreement, tease apart the NN lease and environmental studies, and facilitate closing etc.

They will also recommend/ handle the environmental and soils engineereing if necessary.Once you establish feasibility and capacity you will need to engage and Architect or Design Build GC to begin the design process.This is a simple breakdown of the process.

@Leo Varghese Look messy also looks like category 3 water loss I’m an adjuster and environmental contractor knowing that, that is only the being of the problems that could be I would have to refer you a good buddy of mine also a BiggerPockets member @Carlos Ramirez owner of Relion Restoration wish you the best of luck.

Environmental hazards?