9) adding multiple ADUs or adding an ADU to a quad looses F/F conventional financing.

You won't have multiple systems--one for CRM, one for PM, another for collaboration.  

Investing in real estate, particularly through avenues like foreclosures and tax sales, indeed requires a solid understanding of multiple aspects, including legal considerations.

You can also sell them on sites like paperstac, debexpert or others as well as brokers like Mission Capital, Rams or Phoenix.Depending on quality of paper and interest rate will determine sales price - also I would say self servicing can have a negative impact on the sales price as the major players in the space are not fond of self servicing. 

The shorter the prepayment term has an impact on increasing the rate.4.

Simultaneously, develop a detailed scope of work and collect bids from multiple contractors to compare costs and timelines.

Deal makers-  development potential, vehicles per day, road ingress egress off highway, signage potential, multiple road accesses, value add potential- housing- trees, boulders, ponds, walkout, views, right side of town, power-line right of ways, etc6.  

Is it a multiple of the NOI? 

Recently the city issued a notice about the property not being zoned for multiple family occupancy.

You are correct, most properties list accordingly will have multiple offers in this market.