I have a portable Allstar Node (43943) which I recently needed to setup on Wifi.
I thought adding a display would come in handy and it did.
Now i can configure the node locally instead of having to log in remotely.

I purchased the Adafruit 5"  800x480 TFT HDMI Backpack

I did need to add this in    /boot/config.txt    file for it to work.

# uncomment if you get no picture on HDMI for a default "safe" mode

# uncomment this if your display has a black border of unused pixels visible
# and your display can output without overscan

# uncomment the following to adjust overscan. Use positive numbers if console
# goes off screen, and negative if there is too much border

# uncomment to force a console size. By default it will be display's size minus
# overscan.

# uncomment if hdmi display is not detected and composite is being output

# uncomment to force a specific HDMI mode (here we are forcing 800x480!)
hdmi_cvt=800 480 60 6 0 0 0

# uncomment to force a HDMI mode rather than DVI. This can make audio work in
# DMT (computer monitor) modes

# uncomment to increase signal to HDMI, if you have interference, blanking, or
# no display

# uncomment for composite PAL

#uncomment to overclock the arm. 700 MHz is the default.

# for more options see http://elinux.org/RPi_config.txt
I put this line of code in the /boot/config.txt file prior to setting up my node.  (On another Pi I had at home)

I then configured my node using the new version 1.5 code from Hamvoip.com

In turn I was able to configure my Freedom Pop Wifi hotspot locally with the
keyboard and monitor attached.

Note, I had intitally setup this node on my wired network at home, and figured I could just later setup
the wifi, but I was having trouble getting the wifi configured for some reason.  With the monitor hooked up
to this portable node, I had no trouble setting up wifi and can use it to connect to other wifi networks when
I travel with this node as the Freedom Pop isn't as reliable as I wish it was.
Image is from the Adafruit site