Just to balance out the opinions - your conversation never looked promising. You are both joking around and you are sending your important requirements amidst all the dumb shit you two are talking. You also seem to initially be in a bent-down position aka "weee I'm so drunk, let's do business if you want! here's my money, remind me tomorrow!".
It's not really clear from that chat who is who's bitch at first. Only later you suddenly shift and stop being his bro and start demanding stuff. I'm not saying someone should always be the bitch, but you should have some discipline when you are talking to contractors, jokes aside.
Otherwise the irresponsible ones will start fucking about. Because you tempt them to fuck about.