@John Moran,There are number of active investors as well as service providers who are frequent contributors on this forum.

A property management company is a vendor and I wouldn't give equity in exchange for vendor services. 

So the only question is, does the Market Rent for that location and Type of Unit cover the HOA, plus Debt Service, plus whatever other Expenses need to be paid..Because if it doesn't, the Landlord is in for a world of hurt!.

The rest is what you are cut out to be.

Replacing a faucet is a fairly quick and easy task for a plumber, but they'll charge one hour of time and sometimes there is a longer minimum for any service call. 

Since I am on H1B, I am planning to take any of the NNN property between 300K to 500K and pay around 50% down payment and rest on mortgage.

The landlord-tenant relationship is simply not all about bloodless logic and the simple exchange of money for a service or product.

Although I would primarily be in the business of wholesaling I’m also going to have my real estate license and I want to offer the services of listing homes and helping people find their dream homes or investment properties.

Is there a way to put 10% down and loan the rest?

I prefer good service over saving 20 bucks a month.