I might be able to connect to the wifi at a nearby home, but that setup isn't ideal. It would be better if the HOA has a stand alone system that isn't reliant on anyone else.
Can you elaborate about why mobile hotspots have been problematic? I'm leaning towards trying the T-mobile setup because it will only cost $15 for the hotspot (T-Mobile Sonic 4G Huawei UMG587 GSM Mobile Hotspot) and the data is free.
If that doesn't work, then I could give Freedompop a try (thanks for the tip). I know we get 5 bars of coverage with any mobile provider because there is a huge tower less than 1/4 mile away.