I would question a client's capacity if they came to me considering a sale for "pennies on dollar".  

It is the ownership and struggles to disposition the loan which will improve a newbies capacity for due diligence.  

I know some people who have worked with them in varying capacities and have heard too many horror stories about the waste, poor management, and questionable attitudes that permeate the organization. 

While in general, coverage is designed in the likes of a honeycomb, the height of the tower, engineered capacity, real estate zoning restrictions,  user demands, and obstruction will play a big part in cellular site saturation.

Has any real estate investors had any success working with Hedge funds in any capacity?

.), tower owners/operators will post site locations on their website or provide database access to approved parties and 3rd party websites that aggregate.However, leasing space on towers will be dependent on various factors ranging from structural capability (existing load/design capacity), availability of utilities and wired connectivity (fiber optics/coax), how much ground space is available for new equipment (could require a new lease with the property owner) and other technical variables that impact coverage and interaction with other existing equipment.In general, anyone looking to build a tower or some other type of site will seek you out.

Find some ways you can add value in the key value centers above and you can partner in some capacity with local developers willing to take you under their wing in trade for said value.  

If a wholesaler, who has no deal at the time, needs proof of my capacity to decide if they want to work with me then they're welcome to visit one of my jobsites or check the tax records.

Missing pre set deadlines(time is$$)poor communicationleaving homes set once you get starter check.Taking on more then you can handle in one month ( guilty- know your capacity)Bad subs-bad can be bad as a person, bad at showing up on time, bad at respecting the property and neighbors. .ect. ( i always ask myself would i send tgem to my gmas)bidding low to get the job, then charging more. inacurrate and not being thurough when bidding. 

I also see where @Jay Hinrichs  is coming from, with his comment that people don't know what they're getting themselves into.Finance is NOT taught in schools in the capacity it should be - much to the detriment of everyone involved.