He won't even show you pictures, and he wants to see where you live (and you're far out of state)? I get that perhaps he isn't around them right now and can't take more pictures. Definitely don't share pictures of yourself or where you live without seeing pictures of his gliders. Offer pictures of your home after that. Ask for a video of the gliders, then offer a video of your home. If he's really trying to be as cautious as you say he is, then he should understand you being equally cautious. Once you have proof the gliders really do exist, then cross the bridge of him coming to your house. Personally, I don't think I'd allow him to come alone. I'd only want him to come if the gliders came. You want to meet the gliders just as much as he wants to see your place. And if he does come to your house, make sure you have like two other adults with you. I'm not saying this guy is going to assault you, and I'd like to believe the best in people, but caution is also important. For all you know, this is some huge, beefy man. So I think having a couple people there you trust is a good idea. Then if something does go down, it's three against one. Oh, and definitely keep the door locked until you see him through the peep hole/window and make definitely sure you're okay with him being in your house. Just be cautious.