Or should I simply purchase the domain names and wait until I get closer to returning to the states to start the site? 

In a buyer's market, you have to be a bit more exact and price it closer to what it is worth being careful not to chase the market down but stay ahead of it in price.

Make sure it catches the eye when someone comes by....ie, it doesn't have to be Frank Lloyd Wright, however make sure the grass is mowed, no trash on the lawn, etc.

I would look at the closer recent sales and pick those that best represent the Subject's other characteristics (location, bedroom count, bathroom count, remodeled condition/upgraded, 1 level or multi-level, etc, and they you adjust for any differences (gla size, etc), to come up with an estimated value for each comp.

We have a lack of housing and plenty of property's going up for sale that are closer to 1k an acre.

The closer the better, they are much more sought after and retain there value better.

I would be cautious on investing closer to the city.

I usually always call and ask how soon the closer can close before I send them docs if I need it closed on a deadline.    

I bought a small mobile home park 5 years ago and I've done numerous repairs, moving people's stuff out into the grass with the sheriff standing by, repairing broken water pipes at 1:00 in the morning and on and on.

But I realize that’s not guaranteed, I’d adjust as needed as the dates got closer if they weren’t booking.