Normally I'd use 5% maintenance reserves but this property is brand new, so I went with 3%.

They recharged the freon for $160 and it was like brand new.

Newer than 1985 = 5% and Brand new homes built as rentals = 3%.Remember that the higher cashflow properties may look great on paper but with any investment, the higher returns come with higher risk.

Some note investors will treat a brand new note as a non-performer or close to it.

A number of roof replacements, multiple brand new HVAC units put in, whole house re-pipes, complete interior & exterior repaints, remodels, etc. 

I spent quite few hours looking after the most comprehensive information I can find online, found many big names and after reviewing them found out that part of them asking few thousands but reviews are not great, other ones found more as scammers that changing the brand/course name . 

I'm brand new to investing.

After 16 years as a sales Agent I had considered opening my own Brokerage @Brandon Carlson, however, after weighing the expected cost, effort, risks and headaches as mentioned by @Russell Brazil, I opted to go with a Brokerage that handles all that for me while I can build & manage my team, have the option of keeping my own team brand, and receive the financial benefits of commissions from the sales of other agents which is generally only available to Broker-owners.  

Especially when you look back in 5 years and see that it worked, it will show others your progress and dedication to the process of your brand is your business.

They will be less expensive then some fancy overpriced brand name auctioneers (unless you believe there is something really valuable and need big auction house exposure).