We owned a 173 for over 6 years. It was a great trailer and we loved it. We did a lot of mods and spent many multi-week trips in it. We probably put about 30,000 miles on it.
I can tell you from experience that a loaded 173 will weigh more than 2000 pounds. We stopped by the local county dump and weighed our rig before every trip. The 173 weighed 3300 fully loaded with all of our clothes, , food , 2 bikes and nothing in the 3 tanks. We don’t go extrA heavy, but we were going out for 3 months.
The point- don’t even think that a 173 will weigh less than 2500 in my opinion. That figure doesn’t include batteries, propane, a/c, m/w and empty tanks. You will easily add 500 pounds or so of pots and pans, clothes, food, drinks, tous, etc.
We pulled it with a Chevy Astro van and it was acceptable, but not much extra power, brakes or transmission. We traded for a larger tow vehicle.
Check your numbers carefully. The safety of everyone is involved.
Vann