Denver and its surrounds have particularly active markets and a lot of active individuals offering ancillary services so I'd suggest you research those available services you're looking at offering to help you get an idea for what is well covered, what is lacking and what your competitor's pricing looks like.

So far I got only individuals with a rent limit of 1200-1600is it  common to let  2 - 3 individuals who don't know each other rent the house?

What i would recommend is joining a REA or other real estate meet-up group where you can connect with other likeminded individuals consistently and share knowledge.

Do not deal with any of the individuals mentioned in this thread:https://www.biggerpockets.com/...I outline my experience and many others weighed in. 

If you are receiving 3-5 per week that’s not bad, considering the price is what most individuals look for when looking to rent.

The seller isn’t an individual, it’s a company that engages in all sorts of real estate activities.

There can also be chemicals in the treated lumber that are harmful to the environment.Invest in a good screen or built in door system.  

CAPs are an individual investor's measure of acceptable risk for a given reward.

Found several others affected by this individual.

We filed for an ITIN (Individual Taxpayer Identification Number), what I believe is similar to the Netherlands BSN and Espana's NIE.