If you ever decide to look over in this area, I'd be happy to put you in touch with the systems I utilize over here and give you insight on which areas to look for. 

I feel in real estate if one is truly involved in it these are two of the most important sites utilized.

Some wholesalers utilize this strategy because the buyer does not see your wholesale fee. 

If there issues that need to be worked out with the 6-unit property, I would utilize that as a negotiating tool to work out a seller financing strategy with the current owner. 

Purchased home with potential upside in hoping to force appreciation in the house in order to create equity and eventually utilize the equity (HELOC) to begin investing in other properties.

The EPA is hoping  owners will investigate and identify the pipes on their own, report it to their utility provider for tracking, and then the EPA can obtain funding for replacement.

That’s before factoring in utilities or each personal situation.

Unfortunately there's a lot of alarmist/scare tactics utilized to upsell these services that do nothing but generate revenues for those who are selling the service and often leave the clients with recurring expenditures i.e  annual maintenance costs.  

Does it have shared systems you have to manage or separate utilities for everyone? 

@Chirag Mehta For construction costs, you should be around +/- $100 PSF which would include all sitework, utilities, and going vertical with modern finishes.