I have a few friends that do MTRs in the Denver area and they are doing well. 

The biggest question I would ask is how well they know the area such as neighborhoods and do they have connections to building a CORE 4 such as great contractors, property managers, attorneys, etc

As a side note, and maybe others will recommend this as well, obtain your real estate license instead if you are interested in pursuing sales full-time.

Dear Fellow Investors,I hope this message finds you well.

🔥 Yes Trevor. talked to few agents,lenders,contractors, and checking out the properties, trying to figure the good contractor and deals as well.

This post can be informational:https://www.biggerpockets.com/forums/51/topics/1088325-expla...as well as this discussion:https://www.biggerpockets.com/forums/51/topics/1225072-do-i-...A lot more of similar older threads can be found on this very forum.

Head over to bank rate or and take a look at the mortgage calculators, plug in the numbers and get an idea of what the property needs to generate to satisfy the intended debt.You still have to underwrite the deal for the non-finance expenses as well(typically 40-50% of the gross rents). 

Good potential for appreciation/rent growth upside as well in the next 5-10 years in my opinion with the market still being one of the most affordable in the country.

Well done.

You will probably want to pay attention to the income tax basis to any proposed transactions as well as be wary of any transfers that cause a property tax reassessment, depending on whether that amounts to a big increase in taxes or not.Feel free to reach out if you would like referrals in San Diego County in order to work remotely.