In summary you both will get burned. 

Wall Street is high on coke while Main Street is burning, etc. 

I haven't had time to call back yet.or am I just being paranoid and wasting my time and energy...

So you likely could get a great price on the land, but as the neighbor you might not want to offer as low as you really should for LL land to avoid burning bridges.Ultimately it’s not LL to you, you can always grant and easement through your land and sell it no problem.

There is a property where a house used to be, but it appears to have burned down a few years ago, from the images I can find online.

Having the time and energy to invest in comps can be a task for sure. 

I know it's possible they can do a good job, so I don't want to burn a bridge if I can help it.  

Learned quickly I'm not that smart7) Set budget of 20 calls a day, learned to listen instead of telling people how smart I am.8) Burned thru 2 years without too much income, also found out people don't think I'm that smart since I'm a broker.9) Am happier since I like sales and calling people.What do you want to do is probably your biggest question.  

Maintenance costs would be low for awhile and energy efficient for the tenant.

Just want to get this done like a “ seasoned professional” that won’t get taken advantage of and without burning any bridges, because this may be the first of many purchases in this area.Thanks.