Hey noru22 - I helped my parents with this a couple years ago.
The first thing I would do is plug your zip code into : tvfool.com. This will tell you how good of an Antenna you will require. You probably can't put the Antenna on the porch or anywhere outside, so you might need a better one than you think. If you get a Noise Margin above about -10db or so, you can get a signal. For inside, with a smaller Antenna, you might need to have positive NM(db) of +10 or so. Others here might have a better feel for these numbers.
Beyond that, you need a Portable Hard-Drive, and a "box" to receive the programs. This "box" is commonly a "Roku", but there are others that work. You can use your Community's Wi-Fi, but wired is better.
It looks like TableTV still has refurbs on sale for $99 for a Twin-Tuner / $149 for a Quad-Tuner.
A small Drive will cost you $50-$75.
Roku is ~$40 or so.
A decent Antenna is maybe another $50
Good Luck, Kurt