How many permits do I need to apply for a commercial project, and how many plans will I need from the engineer? 

You should answer with, anyone over the age of 18 must apply and be approved to be formally added to the lease and permitted to move in.

I originally purchased this house to be nearby my grandmother in her last few years but realized quickly that it was a prime area for short term rentals as there are no zoning rules or permits necessary etc.

The costs involved are about $100.000 all in (permits, engineering, architects labor , materials ) - I’m thinking that would be a better long term Investment than another SFH . 

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.

They're a small company based out of Ohio I believe and will work with you to build a custom CRM for you and your team. 

NOTE: I use the Customer/Project field to assign properties to my transactions (I know some people use Classes instead).But here’s what I fail to understand.

Some people seemed irritated by how much customization they had do to the CRM to fit into real estate use cases.If there was the perfect real estate CRM, how do you think it would look like?

To achieve outstanding results, you need to develop PREMIUM business, customers that will pay a premium for your services.

I'd also check if renovations were done and if so were permits pulled?