I would think 2" should be enough.  1x2 with drywall and extension rings on your outlets. 

So many times I would tour a home with a client at 8:30am, go to the office and do some prospecting, meet with my team over lunch, research new listings and follow up on phone calls all afternoon, then go home only to have the phone ring during dinner because an offer was coming in at 8:00pm, so race back to the office or property and negotiate a deal, which may or may not close!

Did you try Groups, where each group has a unique ring tone and you assign contacts to one or more groups?

I'm completely new to investing, but I know I am made to hop in this ring.

If you just want the phone to ring be more open. 

I have been working with some Atlanta rental property owners (with units in prime ATL locations) who have been looking for an experienced professional Airbnb rental manager to take over the management (they are looking to transition units from long-term to short-term rentals).If this is something that you think you might be able to help them out with, send me a message or give me a ring, and I would be happy to see if I might be able to get you in touch with the owners.

I track down their phone number and call them after my direct mail piece is sent stating that I'm just calling to follow up. 2) Speed - a) Are you picking up your phone on the first or second ring or are you sending them to voicemail?

Rather than trying to be a wholesaler in either of those areas, consider buying a good deal from a wholesaler, and then, fix and rent.You could build a nice portfolio of cash flow rentals in both those markets, manage it easily from Gravel Switch, and get the brass ring everyone seeks in this business - passive income.Just something to consider.

get ready for that phone to ring... a lot.

Sorry to rain on you, but IMO, hearing, "ONLY, ALL, Never" ignores other choices as if they don't exist, which clearly just aint so, and rings my bell (sorry) - - when there are just consequences to some that 'usually' are unpleasant.