He's very good, affordable, nice to work with, works efficiently and is very professional.

What would be WAY more efficient that doing all of the marketing to bring in seller leads in and have those conversations, is if there were some way to track off market sales prices just like we can for on-market sales in the MLS.Assuming I don't have personal experience negotiating sales prices on flip deals, how would you recommend I go about understanding a reasonable sales price to offer a seller?

The lender can also request the payoff statement, however title is much more efficient at getting these. 

Where I live, in Miami, it is common for landlords to fix up and rent out a garage as an efficiency. 

Each wall heater is 4.17 amps (https://www.eheat.com/envi-high-efficiency-whole-room-120v-plug-in-electric-panel-wall-heater-2nd-generation-hh3012t/) and I would like to install three of them.

Appliances can break or don't run 100% efficient whether you own or rent, it's reality.

If I need to renovate some duplexes from top to bottom, what order will be most efficient?

Steel studs are also not energy efficient.

In an effort to be as efficient as possible, I would like to start only using two types of paints for all of my units, one for common areas / bathrooms and the other for bedrooms.

There is a ton of information on here and I'm trying to be methodical in my approach to absorb as much information as efficiently as possible.