For newly constructed, purchased or renovated properties and also retroactive generally over the last 10 years, building components are properly classified into individual units of property and accurate recovery periods for computing depreciation deductions.

Where can I find proper leads or wholesalers?

In this case, the material cost AND install costs will vary, so having an idea before you even meet the contractor is important.  

When using this structure for investments, the key is to complete IRS Form W9 properly.

It was very complicated and cumbersome to set up properly and difficult to use.

The answer sort of varies on a few factors like are you self-managing, have you had a proper conversation with them over the phone, etc... 

I am now looking for advice on how to structure my bank accounts to properly separate my personal expenses from any expenses surrounding my house hack.

When done properly, they have a high probability of resolving the problem.

It would involve installing new dedicated water pipes per unit, three combi water heaters (to replace the two conventional water heaters and the central boiler), and three gas and water meters.

I can tell you that their involvement is on the financing side only, as they work with local installer partners on the back end with the installer managing the customer relationship so Mosaic wouldn’t typically interact with the customer directly which might explain the gap in the line of communication.