Be sure to read through the Learn section above it is loaded with great info. 

Google Forms has allowed me to make free surveys to get a feel for what people may what from my services.I am able to automate for example; using the IFTTT app(free), I can send a text to a specific number and it will load a google spreadsheet with the address of the property I saw while riding around, which I can then update with other notes for the property.

I started investing right after my 16th birthday with my older brother who could contract and because I wanted to be the first in my family to get a college degree I worked a full time job and carried a full load at college.  

Like the others have said before me...you learned a crap load on this one project and have gained invaluable experience.

Residential single family dwellings will always be viewed with greater weight given to the market approach, always, that is because the market is the best indicator of value due to more activity in the market.

Also at steak is your experience at that point, the cash flow of the entire project and what may be credited to you from the 49% you purchased, not to mention your ability to carry the full load.

Weights are given to each method.  

They hold a lot weight on websites that include this."

An additional house does increase the work load, calls, taxes & legal fees as just reminders.  

Thank you This is a loaded question because there are many factors involved.